JPH0670407B2 - Plasma jet generation method and plasma generator - Google Patents
Plasma jet generation method and plasma generatorInfo
- Publication number
- JPH0670407B2 JPH0670407B2 JP2245851A JP24585190A JPH0670407B2 JP H0670407 B2 JPH0670407 B2 JP H0670407B2 JP 2245851 A JP2245851 A JP 2245851A JP 24585190 A JP24585190 A JP 24585190A JP H0670407 B2 JPH0670407 B2 JP H0670407B2
- Authority
- JP
- Japan
- Prior art keywords
- plasma
- working fluid
- nozzle
- wall
- plasma jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 13
- 239000012530 fluid Substances 0.000 claims description 40
- 239000011148 porous material Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000000498 cooling water Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000036470 plasma concentration Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Plasma Technology (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、プラズマジェット生成法と該方法によるプラ
ズマ発生器、特にラムあるいはスクラムジェットエンジ
ンの着火と火炎保持に必要なプラズマイグナイタの高効
率化を可能にする高効率プラズマジェット生成法とプラ
ズマ発生器に関する。Description: TECHNICAL FIELD The present invention relates to a plasma jet generation method and a plasma generator by the method, and in particular, to high efficiency of a plasma igniter required for ignition and flame holding of a ram or scramjet engine. High efficiency plasma jet generation method and plasma generator that enable
（従来の技術） ラムあるいはスクラムジェットエンジンでは、燃焼器の
中を流れる空気流速が大きく、それに水素等の燃料を噴
射しても通常の手段では着火しにくい。また、着火して
も火炎を燃焼室内に安定に保持し、効率良く燃焼させる
ことも難しい。そこで、近年プラズマトーチによって燃
料に着火、燃焼を安定化する試みがなされている。この
方法は、アーク放電によって形成されたプラズマジェッ
トから、高温ガスあるいは活性化した成分を超音速で噴
射させ、燃料に着火せしめるものである。(Prior Art) In a ram or scramjet engine, the flow velocity of the air flowing through the combustor is high, and even if fuel such as hydrogen is injected into it, it is difficult to ignite by ordinary means. In addition, it is difficult to maintain the flame stably in the combustion chamber even if it ignites and to efficiently burn the flame. Therefore, in recent years, attempts have been made to stabilize the ignition and combustion of fuel with a plasma torch. In this method, a high temperature gas or an activated component is injected at supersonic speed from a plasma jet formed by arc discharge to ignite fuel.
そのための従来のプラズマイグナイタは、第２図に示す
構造を有し、作動ガス12は棒状の陰電極11の周りより供
給され、その中を陽極ノズル15との間でアーク16が形成
される。そのアークによって加熱され、電離した作動流
体はプラズマジェット19となり、燃焼器の中に吹き込ま
れる。そして、従来のイグナイタでは陽極保護のため、
冷却通路18が設けられており、通常は水によって冷却し
ている。The conventional plasma igniter for that purpose has the structure shown in FIG. 2, and the working gas 12 is supplied from around the negative electrode 11 in the shape of a rod, and an arc 16 is formed between it and the anode nozzle 15. The ionized working fluid heated by the arc becomes a plasma jet 19 and is blown into the combustor. And in the conventional igniter, to protect the anode,
A cooling passage 18 is provided and is normally cooled by water.
（発明が解決しようとする問題点） スクラムジェットエンジンの燃焼器では、空気流速は音
速を越え、エンジンの冷却や、燃焼制御の制約により、
空気と燃料の混合比は必ずしも燃焼に最適な理論空燃比
とはならない。それゆえ、確実な着火と火炎保持には効
率の高いプラズマイグナイタが不可欠となる。(Problems to be Solved by the Invention) In a combustor of a scramjet engine, the air velocity exceeds the speed of sound, and due to engine cooling and restrictions on combustion control,
The mixing ratio of air and fuel is not always the optimum stoichiometric air-fuel ratio for combustion. Therefore, a highly efficient plasma igniter is essential for reliable ignition and flame retention.
効率の良いイグナイタの条件は、イグナイタに投入され
た電力が効率良くプラズマに伝達されること、プラズマ
内で化学反応を促進する活性分子が良く生成され、その
濃度が高いこと、そして、それらの活性分子を消滅する
ことなく燃焼器に送り込むことが必要となる。さらに、
エンジンの作動状態が変化しても、安定で効果の高いプ
ラズマの保持が確保されなければならない。The conditions for an efficient igniter are that the electric power input to the igniter is efficiently transmitted to the plasma, that active molecules that promote the chemical reaction in the plasma are well generated and that their concentration is high, and that their activity is high. It is necessary to feed the molecules into the combustor without extinguishing them. further,
Stable and highly effective plasma retention must be ensured even when engine operating conditions change.
しかしながら、上記従来のプラズマイグナイタにおいて
は、イグナイタに投入された電力の20〜50％のエネルギ
ーが冷却水に奪われ、損失となっている。一般に環境圧
力が低くなるとプラズマ強度は低下し、投入した大部分
のエネルギーはプラズマイグナイタの冷却水に奪われ
る。そのため、益々効率が低下する悪循環が生じる問題
がある。これは低圧ではガスが電離し易くなり、イグナ
イタの上流側でアークが短絡するためである。これと似
た現象は、作動流体としてアルゴンを用いた実験で観測
されている。However, in the above-described conventional plasma igniter, 20 to 50% of the electric power supplied to the igniter is lost to the cooling water, resulting in a loss. Generally, when the environmental pressure is low, the plasma intensity is low, and most of the input energy is lost to the cooling water of the plasma igniter. Therefore, there is a problem that a vicious circle occurs in which efficiency is further reduced. This is because the gas is easily ionized at low pressure and the arc is short-circuited on the upstream side of the igniter. A similar phenomenon has been observed in experiments using argon as the working fluid.
一方、従来のトーチではアークの電流を増加させると、
アーク放電路が拡大し、電極間電圧が低下する。そして
さらに負荷を上げていくと、陰極とノズル上流端で放電
が行なわれ、ここで発生した熱は細いノズルを流れる間
に冷却水に奪われ、放電で生成された活性分子はそこで
失活する。このような短絡現象は飛行高度が高く、燃焼
器の作動圧力が低い時に生じるおそれがある。On the other hand, in the conventional torch, when the arc current is increased,
The arc discharge path expands and the inter-electrode voltage decreases. Then, when the load is further increased, discharge is performed at the cathode and the upstream end of the nozzle, and the heat generated here is taken by the cooling water while flowing through the thin nozzle, and the active molecules generated by the discharge are deactivated there. . Such a short circuit phenomenon may occur when the flight altitude is high and the operating pressure of the combustor is low.
本発明は、上記従来のプラズマイグナイタの上記欠点を
解消しようとするもので、投入された電力を効率良くプ
ラズマに伝達し、また、プラズマ内で化学反応を促進す
る活性分子が良く生成され、そして、それらの活性分子
を消滅することなく燃焼器に送り込むことができ、さら
に、エンジンの作動状態が変化しても、安定で効果の高
いプラズマの保持が確保できるようなプラズマイグナイ
タを得ることが出来るプラズマジェット生成法とプラズ
マ発生器を提供することを目的とする。The present invention is intended to solve the above-mentioned drawbacks of the conventional plasma igniter, efficiently transfers the input power to the plasma, and well generates active molecules that promote a chemical reaction in the plasma, and It is possible to obtain a plasma igniter that can send these active molecules to the combustor without disappearing and that can maintain stable and highly effective plasma even if the operating state of the engine changes. It is an object to provide a plasma jet generation method and a plasma generator.
（問題点を解決するための手段） 本発明者は上記問題点解決するために研究を重ねた結
果、従来の冷却水に代えて低温の電離し難いガスを用
い、該ガスをプラズマ発生器のノズル壁より滲み出さ
せ、プラズマの熱ピンチ効果を積極的に利用することを
見出し、本発明に到達したものである。(Means for Solving the Problems) As a result of repeated research for solving the above problems, the present inventor has used a low-temperature gas that is difficult to ionize instead of the conventional cooling water, and uses the gas in the plasma generator. The present invention has been completed by finding out that the thermal pinch effect of plasma is positively utilized by allowing it to exude from the nozzle wall.
即ち、本発明のプラズマジェット生成法は、一次作動流
体を陰極の周りより供給して、陰極と陽極ノズル間に発
生するアークによって一次作動流体を加熱してプラズマ
ジェットを生成するプラズマジェット生成法において、
低温の二次作動流体をノズル内壁よりアークの周りに滲
み出させ、プラズマジェットの周囲を冷却することによ
り、鋭いプラズマジェットを生成することを特徴とす
る。That is, the plasma jet generation method of the present invention is a plasma jet generation method in which a primary working fluid is supplied from around the cathode and the primary working fluid is heated by an arc generated between the cathode and the anode nozzle to generate a plasma jet. ,
It is characterized in that a low-temperature secondary working fluid is exuded from the inner wall of the nozzle around the arc to cool the periphery of the plasma jet, thereby generating a sharp plasma jet.
前記二次作動流体は、一次作動流体と同種のガスである
必要はなく低温で電離度の低いガスであれば良い。何れ
の場合も二次作動流体は冷却用流体として作用し、しか
も冷却損失がなくなる。The secondary working fluid does not have to be the same kind of gas as the primary working fluid, and may be a gas having a low temperature and a low ionization degree. In either case, the secondary working fluid acts as a cooling fluid, and there is no cooling loss.
そして、一次作動流体と二次作動流体の配分を変化させ
ることにより、プラズマの性状を制御することができ
る。Then, the property of plasma can be controlled by changing the distribution of the primary working fluid and the secondary working fluid.
また、該方法による本発明のプラズマ発生器は、ノズル
内壁を多孔質材料で形成し、該ノズル内壁とノズル外壁
とで形成される空間に供給される二次作動流体がノズル
内壁からアークの周囲に滲み出すようにしたことを特徴
とする。前記多孔質材料として、セラミック又は金属の
多孔質材料が採用できる。Further, in the plasma generator of the present invention according to the method, the inner wall of the nozzle is formed of a porous material, and the secondary working fluid supplied to the space formed by the inner wall of the nozzle and the outer wall of the nozzle surrounds the arc from the inner wall of the nozzle. The feature is that it exudes to As the porous material, a ceramic or metal porous material can be adopted.
前記プラズマ発生器を、プラズマイグナイタに適用する
ことによって、スクラムジェットエンジン等の確実な着
火と火炎保持ができる効率の高いプラズマイグナイタが
得られる。By applying the plasma generator to a plasma igniter, it is possible to obtain a highly efficient plasma igniter capable of performing reliable ignition and flame holding in a scramjet engine or the like.
（作用） ノズル内壁をセラミックや金属の多孔質材料で形成し、
陽極ノズルの冷却通路に低温で非電導性の二次作動流体
を供給することによって、二次作動流体による陽極のフ
イルム冷却構造となる。それにより、陽極が冷却されて
保護されると共に、二次作動流体がノズル内壁から滲み
出て、プラズマジェットの周りに低温の二次作動流体に
よる非電導性の鞘が形成され、熱ピンチ効果と呼ばれる
現象が生じる。即ち、プラズマジェットの周囲を冷却す
ることにより、プラズマが収束強化され、中心部のコア
部分の温度が局所的に上昇する現象が生じる。(Function) The inner wall of the nozzle is made of a ceramic or metal porous material,
By supplying a low-temperature non-conductive secondary working fluid to the cooling passage of the anode nozzle, a film cooling structure of the anode by the secondary working fluid is obtained. As a result, the anode is cooled and protected, and the secondary working fluid oozes out from the inner wall of the nozzle to form a non-conducting sheath around the plasma jet by the low temperature secondary working fluid, which causes a thermal pinch effect. The phenomenon called is generated. That is, by cooling the periphery of the plasma jet, the plasma is converged and strengthened, and the temperature of the central core portion locally rises.
そして、ノズル外壁（陽極）近傍に二次作動流体による
低温の電離性の低いガス層が形成されることにより、ア
ークはノズル下流端まで伸されると共に、前記熱ピンチ
効果により収束強化される。その結果、プラズマの中心
部温度は上昇し、活性分子の濃度は指数関数的に飛躍的
に増大する。一方、陽極を冷却した二次作動流体は、そ
のまま燃焼器に吸い込まれるため、再生冷却と同様に熱
損失は生じない、従って、高効率的に鋭いプラズマジェ
ットを生成することができる。By forming a low-temperature gas layer with low ionization property due to the secondary working fluid in the vicinity of the outer wall (anode) of the nozzle, the arc is extended to the downstream end of the nozzle, and is converged and strengthened by the thermal pinch effect. As a result, the central temperature of the plasma rises and the concentration of active molecules exponentially increases dramatically. On the other hand, since the secondary working fluid that has cooled the anode is sucked into the combustor as it is, heat loss does not occur as in the case of regenerative cooling, and therefore a sharp plasma jet can be generated with high efficiency.
二次作動流体は、一次作動流体と必ずしも同種の気体で
ある必要はなく、低温の液体水素や電離しにくいヘリウ
ムを用いることによって、よりプラズマ濃度を高めるこ
とも可能となる。また、一次作動流体と二次作動流体の
配分を変化することによって、プラズマの性状を容易に
制御できる。The secondary working fluid does not necessarily have to be the same type of gas as the primary working fluid, and it is possible to further increase the plasma concentration by using low-temperature liquid hydrogen or helium that is difficult to ionize. Further, the property of plasma can be easily controlled by changing the distribution of the primary working fluid and the secondary working fluid.
（実施例） 以下、本発明の実施例を図面に基づいて詳細に説明す
る。(Example) Hereinafter, the Example of this invention is described in detail based on drawing.
第１図は、本発明に係るプラズマ発生器の一実施例であ
るプラズマイグナイタを示し、図中、１は円錐上の先端
を有する棒状陰極であり、２は該陰極の先端部に設けら
れた同軸の陽極ノズルである。該陽極ノズル２は、陽極
となるノズル先端部を含むノズル外壁３とノズル内壁４
とで形成される。ノズル内壁４はセラミック或いは金属
等の多孔質材料によって形成され、その基端側は陰極支
持と共に、一次作動体通路と二次作動体通路の隔壁を兼
ねる陰極と同軸状に設けられた鞘体５に連接されてい
る。６は陰極と前記鞘体５及びノズル内壁との間に形成
された一次作動流体通路、７は陽極と前記鞘体及びノズ
ル内壁との間に形成された二次作動流体通路である。FIG. 1 shows a plasma igniter which is an embodiment of a plasma generator according to the present invention. In the figure, 1 is a rod-shaped cathode having a conical tip, and 2 is provided at the tip of the cathode. It is a coaxial anode nozzle. The anode nozzle 2 includes a nozzle outer wall 3 and a nozzle inner wall 4 including a nozzle tip portion that serves as an anode.
It is formed by and. The inner wall 4 of the nozzle is made of a porous material such as ceramic or metal, and the base end side of the inner wall 4 supports the cathode and also has a sheath body 5 coaxially provided with the cathode which also serves as a partition wall for the primary and secondary operation body passages. Are connected to. 6 is a primary working fluid passage formed between the cathode and the sheath 5 and the inner wall of the nozzle, and 7 is a secondary working fluid passage formed between the anode and the sheath and the inner wall of the nozzle.
以上のように構成された本実施例のプラズマイグナイタ
は、前述のようにノズル内壁４より低温の電離しにくい
一次作動流体をアーク８の周りに滲みださせ、プラズマ
の熱ピンチ効果を積極的に利用することにより、プラズ
マを制御し、従来のようにエネルギーが冷却水に奪われ
ることないので、熱損失無しに鋭いプラズマジェット９
を生成することができる。したがって、ラムあるいはス
クラムジェットエンジンに適用して、確実な着火と火炎
保持が可能となる。さらに、エンジンの作動条件が変化
しても安定で効果の高いプラズマの保持が可能となる。As described above, the plasma igniter of the present embodiment configured as described above causes the primary working fluid at a temperature lower than that of the inner wall 4 of the nozzle, which is hard to be ionized, to ooze around the arc 8 to positively effect the thermal pinch effect of plasma. By utilizing it, the plasma is controlled and energy is not lost to the cooling water as in the conventional case.
Can be generated. Therefore, when applied to a ram or scramjet engine, reliable ignition and flame retention are possible. Further, even if the engine operating conditions change, stable and highly effective plasma can be maintained.
なお、上記実施例はプラズマイグナイタの場合である
が、本発明のプラズマジェット生成法とプラズマ発生器
はプラズマイグナイタに限らず、その他のプラズマ発生
器にも適用できることは言うまでもない。Although the above embodiment is a case of a plasma igniter, it goes without saying that the plasma jet generation method and the plasma generator of the present invention are not limited to the plasma igniter and can be applied to other plasma generators.
（効果） 本発明は、以上のような構成からなり、次のような格別
の効果を奏する。(Effect) The present invention is configured as described above and has the following special effects.
プラズマの熱ピンチ効果を積極的に利用してプラズマを
制御するので、従来のようにエネルギーが冷却水に奪わ
れず、熱損失なしに鋭いプラズマジェットを生成するこ
とができる。Since the plasma is controlled by positively utilizing the thermal pinch effect of the plasma, it is possible to generate a sharp plasma jet without heat loss without losing the energy to the cooling water as in the conventional case.
また、一次作動流体と二次作動流体の配分を変化するこ
とによって、プラズマの性状を容易に制御できる。Further, the property of plasma can be easily controlled by changing the distribution of the primary working fluid and the secondary working fluid.
高効率プラズマイグナイタを得ることができるので、ラ
ムあるいはスクラムジェットエンジンにおける燃料の確
実な着火と火炎保持を図ることができる。さらに、エン
ジンの作動条件が変化しても安定で効果の高いプラズマ
の保持が可能となる。Since a highly efficient plasma igniter can be obtained, reliable ignition and flame holding of fuel in a ram or scramjet engine can be achieved. Further, even if the engine operating conditions change, stable and highly effective plasma can be maintained.
第１図は本発明の実施例に係るプラズマイグナイタの側
断面図、第２図は従来のプラズマイグナイタの側断面図
である。 1:陰極、2:陽極ノズル、3:ノズル外壁（陽極）、4:ノズ
ル内壁、5:鞘体、6:一次作動流体通路、7:二次作動流体
通路、8:アーク、9:プラズマジェットFIG. 1 is a side sectional view of a plasma igniter according to an embodiment of the present invention, and FIG. 2 is a side sectional view of a conventional plasma igniter. 1: Cathode, 2: Anode nozzle, 3: Nozzle outer wall (anode), 4: Nozzle inner wall, 5: Sheath body, 6: Primary working fluid passage, 7: Secondary working fluid passage, 8: Arc, 9: Plasma jet
Claims (8)
陰極と陽極ノズル間に発生するアークによって一次作動
流体を加熱してプラズマジェットを生成するプラズマジ
ェット生成法において、低温の二次作動流体をノズル内
壁よりアークの周りに滲み出させ、プラズマジェットの
周囲を冷却することにより、鋭いプラズマジェットを生
成することを特徴とするプラズマジェット生成法。1. A primary working fluid is supplied from around the cathode,
In the plasma jet generation method in which the primary working fluid is heated by the arc generated between the cathode and the anode nozzle to generate the plasma jet, the low-temperature secondary working fluid is exuded from the inner wall of the nozzle around the arc to A plasma jet production method, characterized in that a sharp plasma jet is produced by cooling the plasma.
である請求項１記載のプラズマジェット生成法。2. The plasma jet production method according to claim 1, wherein the secondary working fluid is the same gas as the primary working fluid.
で電離度の低いガスである請求項１記載のプラズマジェ
ット生成法。3. The plasma jet generation method according to claim 1, wherein the secondary working fluid is a gas having a low temperature and a low ionization degree different from that of the primary working fluid.
させることにより、プラズマの性状を制御する請求項３
記載のプラズマジェット生成法。4. The property of plasma is controlled by changing the distribution of the primary working fluid and the secondary working fluid.
The described plasma jet generation method.
陰極と陽極ノズル間に発生するアークによって一次作動
流体を加熱してプラズマジェットを生成するプラズマ発
生器において、ノズル内壁を多孔質材料で形成し、該ノ
ズル内壁とノズル外壁とで形成される空間に供給される
二次作動流体がノズル内壁からアークの周囲に滲み出す
ようにしたことを特徴とするプラズマ発生器。5. A primary working fluid is supplied from around the cathode,
In a plasma generator in which a primary working fluid is heated by an arc generated between a cathode and an anode nozzle to generate a plasma jet, a nozzle inner wall is formed of a porous material, and a space formed by the nozzle inner wall and the nozzle outer wall is formed. A plasma generator characterized in that the supplied secondary working fluid exudes from the inner wall of the nozzle to the periphery of the arc.
である請求項５記載のプラズマ発生器。6. The plasma generator according to claim 5, wherein the porous material is a ceramic porous material.
請求項５記載のプラズマ発生器。7. The plasma generator according to claim 5, wherein the porous material is a metallic porous material.
タである請求項５、６又は７記載のプラズマ発生器。8. The plasma generator according to claim 5, 6 or 7, wherein the plasma generator is a plasma igniter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245851A JPH0670407B2 (en) | 1990-09-14 | 1990-09-14 | Plasma jet generation method and plasma generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2245851A JPH0670407B2 (en) | 1990-09-14 | 1990-09-14 | Plasma jet generation method and plasma generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04124445A JPH04124445A (en) | 1992-04-24 |
| JPH0670407B2 true JPH0670407B2 (en) | 1994-09-07 |
Family
ID=17139787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2245851A Expired - Lifetime JPH0670407B2 (en) | 1990-09-14 | 1990-09-14 | Plasma jet generation method and plasma generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0670407B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20031331L (en) * | 2003-09-17 | 2005-03-18 | Tomion Oy | Cooled plasma torch and method for cooling the torch |
| IL168286A (en) * | 2005-04-28 | 2009-09-22 | E E R Env Energy Resrc Israel | Plasma torch for use in a waste processing chamber |
| US9021781B2 (en) * | 2013-01-04 | 2015-05-05 | General Electric Company | Fuel injector having an ignitor for igniting a combustor of a gas turbine |
| US10794331B2 (en) * | 2017-07-31 | 2020-10-06 | The Boeing Company | Scramjets and associated aircraft and methods |
| CN114427497A (en) * | 2021-11-29 | 2022-05-03 | 中国航发沈阳发动机研究所 | Plasma flame generator and ignition system for axial-flow engine |
| CN115263599B (en) * | 2022-06-08 | 2025-02-07 | 中国人民解放军空军工程大学 | Method of plasma-assisted jet control of scramjet engine operating mode |
-
1990
- 1990-09-14 JP JP2245851A patent/JPH0670407B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04124445A (en) | 1992-04-24 |
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