推进技术
推進技術
추진기술
JOURNAL OF PROPULSION TECHNOLOGY
2008年
2期
179-186
,共8页
罗振兵%夏智勋%王德全%胡建新%缪万波%黄利亚
囉振兵%夏智勛%王德全%鬍建新%繆萬波%黃利亞
라진병%하지훈%왕덕전%호건신%무만파%황리아
流量控制%矢量控制+%合成射流+%矢量角%数值仿真
流量控製%矢量控製+%閤成射流+%矢量角%數值倣真
류량공제%시량공제+%합성사류+%시량각%수치방진
Flow control%Vectoring control+%Synthetic jet+%Vectoring angle+%Numerical simulation
合成射流激励器射流矢量控制具有对吸气式发动机进气道出流和发动机喷管流动进行矢量控制的潜力.通过对四种不同出口构型合成射流激励器控制主流矢量偏转的数值模拟和分析,对合成射流控制主流矢量的发展过程进行了研究.结果表明:合成射流控制主流矢量的发展过程可分为三个不同阶段,第一阶段,在主流通道内,激励器工作引起的主流通道压强梯度形成的侧向力致偏主流,在出口处主流矢量偏转φⅠ;第二阶段,在主流出口附近,合成射流对主流的卷吸作用和引射作用,致偏主流φⅡ;第三阶段,在出口下游,合成射流与主流自由剪切层发生相互耦合作用,致偏φⅢ.因此,主射流最终偏转角度咖是其在经历三个不同阶段时受到的合成射流致偏作用之和,即φ=φⅠ+φⅡ+φⅢ.
閤成射流激勵器射流矢量控製具有對吸氣式髮動機進氣道齣流和髮動機噴管流動進行矢量控製的潛力.通過對四種不同齣口構型閤成射流激勵器控製主流矢量偏轉的數值模擬和分析,對閤成射流控製主流矢量的髮展過程進行瞭研究.結果錶明:閤成射流控製主流矢量的髮展過程可分為三箇不同階段,第一階段,在主流通道內,激勵器工作引起的主流通道壓彊梯度形成的側嚮力緻偏主流,在齣口處主流矢量偏轉φⅠ;第二階段,在主流齣口附近,閤成射流對主流的捲吸作用和引射作用,緻偏主流φⅡ;第三階段,在齣口下遊,閤成射流與主流自由剪切層髮生相互耦閤作用,緻偏φⅢ.因此,主射流最終偏轉角度咖是其在經歷三箇不同階段時受到的閤成射流緻偏作用之和,即φ=φⅠ+φⅡ+φⅢ.
합성사류격려기사류시량공제구유대흡기식발동궤진기도출류화발동궤분관류동진행시량공제적잠력.통과대사충불동출구구형합성사류격려기공제주류시량편전적수치모의화분석,대합성사류공제주류시량적발전과정진행료연구.결과표명:합성사류공제주류시량적발전과정가분위삼개불동계단,제일계단,재주류통도내,격려기공작인기적주류통도압강제도형성적측향력치편주류,재출구처주류시량편전φⅠ;제이계단,재주류출구부근,합성사류대주류적권흡작용화인사작용,치편주류φⅡ;제삼계단,재출구하유,합성사류여주류자유전절층발생상호우합작용,치편φⅢ.인차,주사류최종편전각도가시기재경력삼개불동계단시수도적합성사류치편작용지화,즉φ=φⅠ+φⅡ+φⅢ.
The technique of jet vectoring using synthetic jets has a potential ability of thrust vectoring a primary jet,such as thrust vectoring controlling the inlet air jet and the nozzle jet of the air-breathing engine.To investigate the evolution of vectoring control of a primary jet with synthetic jets,a primary jet vectoring control using synthetic jet actuators with different exit configurations was numerically simulated and analyzed.The results show the evolution of jet vectoring using synthetic jets is divided into three stages.In the conduit of the primary jet,the low-pressure region,which results from the interaction between the synthetic jet and the primary jet,contributes to the vectoring force and leads to a turning of the primary jet at the conduit exit,and the primary jet turns φⅠ.And then,in the near field,the primary jet fluid is entrained and absorbed by the synthetic jet during the blowing and the suction stroke,and the primary jet turns φⅡ.Finally,in the far field,the shear layer of primary jet is inspirited by the vortices of synthetic jet,and the primary jet turns φⅢ.So the final vectoring angle of the primary jet is a overall result of the primary jet controlled by synthetic jet at the three stages,φ=φⅠ+φⅡ+φⅢ.