【摘要】 建立了描述激光控制分解式固体微推力器内流动特性的计算模型,对激光微推力器内流动进行了数值计算,计算值与实验结果吻合较好。分析了气体粘性和压强对激光微推力器内流动特性的影响。结果表明,微推力器内流动受低压、小尺寸的综合影响,喷管喉径小于0.8 mm时,气体粘性对推力器性能影响显著增强;提高推力器内压强是减小粘性影响的一种有效手段。更多还原

【Abstract】 A computation model,which can be used for describing inner flow characteristics of the decomposable solid micro-thrusters controlled by laser,was derived to numerically calculate inner flowin the micro-thrusters.The calculated results coincidedwell with experimental results.The effects of gas viscosity and pressure on inner flowcharacteristics of micro-thrusters controlled bylaser were analyzed.The results showthat both lowpressure and small dimension have effect on inner flowcharacteristics of micro-thrusters.When throat diameter of nozzle is less than 0.8 mm,the effects of gas viscosity on micro-thruster performances are obvi-ously strengthened.It is an effective methods to reduce negative influence of gas viscosity by increasing the pressure in micro-thrusters.更多还原