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为了合理控制内锥面压缩强度的份额、提高进气道压缩效率,提出了一种内锥面中间段压缩较缓的新型马赫数减速规律,结果表明新型马赫数减速规律的单位压比压缩损失相对于反正切马赫数分布降低了20%。为了进一步改善基准流场,提出了基于流动角分布可控的中心体反设计方法,实现了内锥面马赫数分布和中心体表面流动角分布双重可控的基准流场反设计。此外,还研究了该基准流场对内转进气道性能的影响。结果表明,通过中心体表面流动角分布反设计中心体构型可显著降低基准流场压缩损失,相比于等直中心体损失至少降低了34%,从而提高了内转进气道性能。
In order to rationally control the share of internal cone compressive strength and improve the efficiency of inlet compression, a new law of Mach number reduction with a moderate compression of the internal conical surface was proposed. The results show that the unit compression ratio loss Mach number distribution relative to the arc tangent reduced by 20%. In order to further improve the reference flow field, a centroid inverse design method based on flow angular distribution control is proposed, and the inverse control of the reference flow field with dual controllable inner cone Mach number distribution and center body flow angle distribution is achieved. In addition, the influence of the reference flow field on the performance of the internal inlet is also studied. The results show that the compression loss of the reference flow field can be significantly reduced by centralizing the flow distribution of the central body surface and reducing the loss of the reference flow field by at least 34% compared with that of the equidistant central body, thus improving the performance of the inlet-inlet duct.