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进气道是冲压发动机的重要部件,它的性能关系着炮弹冲压增程发动机性能的好坏。文章阐述衡量炮弹固体燃料冲压增程发动机进气道性能的指标,介绍冲压发动机进气道的分类,着重给出了某炮弹固冲增程发动机混压式双锥进气道在马赫数2.0096时的风洞实验结果,并进行了详细的分析。研究表明,实验马赫数2.0096时,在进气道有效流通面积范围内,随着进气道有效流通面积的减小,总压恢复系数增加;随着弹体迎角的增加,总压恢复系数降低。
Intake air duct is an important part of the ramjet engine and its performance is related to the performance of the engine with ramjet extended range. The article expounds the index to measure the performance of the inlet of the extended range engine of the projectile with solid fuel, introduces the classification of the inlet of the ramjet engine, and emphatically gives the difference between the Mach number Wind tunnel experiment results, and conducted a detailed analysis. The results show that when the experimental Mach number is 2.0096, the total pressure recovery coefficient increases with the decrease of the effective flow area of the intake passage in the effective flow area of the intake passage. With the increase of the attack angle of the projectile, the total pressure recovery coefficient reduce.