曲锥前体/三维内转进气道一体化设计与分析

Integration design and analysis for curved conical forebody and three-dimensional inward turning inlet

对圆锥流场在不同攻角条件下的气动特征进行分析,以流线追踪技术为基础,发展了一种曲锥前体/三维内转进气道一体化设计方法,获得了三个几何参数对一体化方案外形和性能的影响规律。研究发现,三维内转进气道侧壁外扩角对进气道流量捕获系数影响明显,而捕获形状圆心角对进气道的影响主要表现在几何特征上。此外,进气道流量捕获系数随外压缩段总长度的增大而减小。基于对捕获形状的研究,设计了一种曲锥前体/三维内转进气道,并通过数值模拟对该方案进行研究。结果表明:在设计点来流马赫数为6.0时,该方案进气道流量捕获系数能够达到0.93,且具有0.61的总压恢复系数;在非设计点来流马赫数为5.0时,流量捕获系数能够保持在0.86,总压恢复系数为0.77。

By analyzing the aerodynamic characteristics of different angles of attack on conical flow field, and based on the streamlines traced concept, an integrated designed meth- odology for curved conical forebody and three-dimensional inward turning inlet was pro- posed~ besides, the effects of three outline and position parameters on the integrated config- uration were theoretically investigated. It was discovered that the effect of the expansion an- gle of side wall on the inlet mass flow rate coefficient was remarkable, while the effect of the central angle on inlet was mainly reflected on geometric features. Furthermore, the mass flow rate coefficient of the inlet demonstrated a negative correlation with the external com- pression surface length. Based on the investigation of the flow capture shape, an integrated configuration of the curved conical forebody and three-dimensional inward turning inlet was then designed and studied numerically. The results show that, at the design point （incoming Mach number is 6.0）, the mass flow rate coefficient of the inward turning inlet is 0.93, and the total pressure recovery coefficient is 0.61. In addition, at off-design point （incoming Mach number is 5.0）, the mass flow rate coefficient and the total pressure recovery coeffi- cient are 0.86 and 0.77, respectively.