目前, 带缝隙钝舵的缝隙引起的流场结构和气动加热规律变化, 还很不明确, 需要研究缝隙诱导所形成旋涡的空间分布特征和旋涡运动对物面气动加热的影响规律.通过分析高超声速钝舵缝隙气动加热问题, 基于无缝隙钝舵, 建立一种带缝隙钝舵简化模型.使用有限体积方法求解可压缩Navier-Stokes方程, 通量采用van Leer通量向量分裂方法计算.插值采用MUSCL方法, 时间项采用LU-SGS隐式方法.结果表明:无缝隙钝舵流场结构相对简单, 带缝隙钝舵流场结构同无缝隙钝舵相比要更为复杂, 舵轴上游缝隙内会出现马蹄形涡串结构, 相应地在缝隙的上下表面均会出现马蹄形高热流区;受缝隙诱导分离再附流动的影响, 在舵轴迎风面以及舵体侧面后部均形成了局部高热流区.%At present, the change of flow field structure and aerodynamic heating law caused by slot blunt fin gap is still unclear, so it is necessary to study the spatial distribution feature of the vortex induced by gap and corresponding relations between the vortex motion and heat-flux distribution. By analyzing the aerodynamic heating problem of hypersonic blunt fin gap, a simplified model of blunt fin gap is established based on the seamless blunt rudder. Compressible Navier-Stokes equation is solved by finite volume method, and Flux is calculated by van Leer flux vector splitting method. Interpolation method employ the MUSCL and LU-SGS implicit method are used for time term. The results show that the flow field structure of seamless blunt rudder will be relatively simple, and the flow field structure of blunt rudder with gap will be more complex than that of seamless blunt rudder. Horseshoe-shaped vortex string structure will appear in the upstream crevice of rudder shaft, and correspondingly horseshoe-shaped high heat flow zones will appear on the upper and lower surfaces of gap; Due to the influence of gap induced separation and reattachment flow, local high heat flow zones will form on the windward side of rudder shaft and the rear side of rudder body.
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