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用管道火箭燃烧试验装置研究了影响管道火箭燃烧效率的一次燃烧室富燃气体的理化特性和二次燃烧室富燃气体与空气的混合机理。在燃气发生器药柱中混入30％的硼粉,与空气的混合比在13以上时,比冲可达1000s。试验结果表明,釆用多出口进气道将流入进气道的空气沿轴向分开,从多出口进气道前出口引入燃烧所需的空气,用平均粒度为2.7μm的硼粉时,η_c效率可达87％以上,平均可达91％。用单出口进气道则η_c只能达到约’9％.
The physical and chemical characteristics of the rich combustion gas in the primary combustion chamber and the mixing mechanism of the rich combustion gas and the air in the secondary combustion chamber were studied by the pipeline rocket burning test device. 30% boron powder is mixed into the gas generator grain, and the specific impulse is up to 1000s when the mixture ratio with air is above 13. The test results show that the use of multiple outlet inlet air flow into the inlet along the axial separation from the outlet before the multi-outlet air introduced combustion required air, with an average particle size of 2.7μm boron powder, η_c Efficiency up to 87%, an average of up to 91%. With a single outlet intake port η_c can only reach about 9%.