为了研究射流总温与射流通道结构对喷管喉道面积控制的影响规律,文中对二元收扩喷管的气动喉道控制进行数值模拟,研究结果表明:增大射流总温能使喉道面积控制效率增大;对比两种采用不同射流通道的气动喷管,在低射流总压比下采用收敛型射流通道的喷管喉道面积控制效率较高,在高射流总压比下采用收扩型射流通道的喷管喉道面积控制效率较高;射流总压比增大喉道面积控制效率先增大后减小;由此归纳出射流速度增大能明显提高射流的喉道面积控制效率。关键词:二元喷管;气动喉道控制;射流通道;数值仿真

In order to analyze the influence of injection total temperature and injection pipe shape on fluid throat area control, numerical simulation was performed on fluid throat control of 2-dimensional convergent-divergent nozzle. Results show that the efficient of throat area control (ETAC) increases gradually along with the increase of injection total temperature; compared the two fluidic nozzles, injection pipe in convergence shape has higher ETAC under lower injection pressure ratio(SPR), while injection pipe in convergence-divergence shape has higher ETAC under higher injection pressure ratio; as SPR increases, ETAC first increases and then decreases; a higher velocity of the injection on injection exit can lead to a higher injection ETAC. Keywords: 2-dimensional nozzle; fluid throat control; injection; numerical simulation