机电工程外文翻译--推力矢量技术综述(编辑修改稿)

机电工程外文翻译--推力矢量技术综述(编辑修改稿)内容摘要：

quite difficult. Therefore has developed the axial symmetry thrust force vector Corporation starts the axial symmetry thrust force vector nozzledevelopment in the 1980s intermediate stages, its development nozzlechanges the adjustment by 3 A9/ 4 A8/ throat areaadjustment, 3 adjustable rings constitution and so on asupporting organization, nozzle control valve as well as group ofheatresisting seals pieces. Flow field thrust force vector nozzle The flow field thrust force vector nozzle is pletely different tothe front several kind of machineries does moves the type thrust forcevector nozzle, its mai n characteristic lies in through (SecondaryFluid) affects the main stream in the nozzle divergent sectionintroduction lateral inferior air current the condition, achieves thechange and the control main stream area and the direction, then gainthrust force vector goal. Its most main merit was saves the machinerywhich the massive implementations thrust force vector used totransport, simplified the structure, reduced the airplaneweight, reduced the maintenance cost. The realization flow field thrust vector control has the many kinds ofways below, at present studies has the way: （ 1) jet thrust vector control. By the air current after the nozzledivergent section or many injections, the force main streamattaches depends on flows to on the opposite side wallsurface, thus produces the side. （ 2） regurgitation thrust vector control. The tip of nozzle in exteriorto add a coat, forms the reverse mobile regurgitation cavity to say,when needs the mainstream deflection, the start pumps the system toform the negative pressure, causes the main stream deflection toproduce the side. （ 3）machinery/fluid bined type thrust vector control. In is apartfrom throat section of distances place, the small air operated accentwhich is loaded with or many lengths is equal to throat diameter 15%35% may rotate , by the servo control rotation, and may whenthe non vector condition shrinks the pipe wall, through moves causes the air 中北大学 2020 届毕业设计说明书 第 5 页 共 6 页 current deflection, produces the side. In these kind of thrust forces vector installment, the baffle plan onairplane and so on X31, F14, F18 has only made the experimentalconfirmation, explained the thrust vector control airplane haseffectiveness, the thrust force vector technology plan whichafterwards develops has not been used. The dual vector nozzleresearch, the technology also is most early maturest, already wasairplane and so on F22 uses. The axial symmetry thrust force vectornozzle research is slightly late to the dual vector nozzle, butdevelops quickly, the oneself by SU35, SU37 is used. Compared with says, axial symmetry vector nozzle pared to dualvector nozzle function more superior, the technical difficulty isbigger, therefore the present various countries research developmentalready the extension has transferred to on with emphasis the axialsymmetry vector nozzle. The flow field thrust force vector nozzle thenbecause studies late, still in the research exploration stage, topractical still had section of distances, but most has the futurethrust force vector nozzle. 三． Application of thrust vectoring technology after some tactical。