A novel third-order optimized symmetric weighted essentially non-oscillatory(WENO-OS3)scheme is used to simulate the hypersonic shock wave/boundary layer interactions.Firstly,the scheme is presented with the achieveme...A novel third-order optimized symmetric weighted essentially non-oscillatory(WENO-OS3)scheme is used to simulate the hypersonic shock wave/boundary layer interactions.Firstly,the scheme is presented with the achievement of low dissipation in smooth region and robust shock-capturing capabilities in discontinuities.The Maxwell slip boundary conditions are employed to consider the rarefied effect near the surface.Secondly,several validating tests are given to show the good resolution of the WENO-OS3 scheme and the feasibility of the Maxwell slip boundary conditions.Finally,hypersonic flows around the hollow cylinder truncated flare(HCTF)and the25°/55°sharp double cone are studied.Discussions are made on the characteristics of the hypersonic shock wave/boundary layer interactions with and without the consideration of the slip effect.The results indicate that the scheme has a good capability in predicting heat transfer with a high resolution for describing fluid structures.With the slip boundary conditions,the separation region at the corner is smaller and the prediction is more accurate than that with no-slip boundary conditions.展开更多
为了研究高超声速流激波边界层干扰特性,选取HIFi RE-2(The Hypersonic International Flight Research Experimentation2)项目的高超声速流道为研究对象,采用k-ωSST模型在无燃油工况下模拟计算地面试验过程,所得计算结果与试验结果接...为了研究高超声速流激波边界层干扰特性,选取HIFi RE-2(The Hypersonic International Flight Research Experimentation2)项目的高超声速流道为研究对象,采用k-ωSST模型在无燃油工况下模拟计算地面试验过程,所得计算结果与试验结果接近。在此基础上,分析激波边界层干扰过程、流动分离现象及入口马赫数对气动热影响。结果表明:随着入口马赫数增大,激波角变小,激波强度提高,在尾喷管中激波反射次数减少;随着入口速度增大,边界层分离区范围变小,回流区的位置逐渐向下游移动;加入气动耗散项后,流场的温度有一定升高,最大温升约为50 K。展开更多
基金supported by the National Key Basic Research and Development Program (No.2014CB744100)
文摘A novel third-order optimized symmetric weighted essentially non-oscillatory(WENO-OS3)scheme is used to simulate the hypersonic shock wave/boundary layer interactions.Firstly,the scheme is presented with the achievement of low dissipation in smooth region and robust shock-capturing capabilities in discontinuities.The Maxwell slip boundary conditions are employed to consider the rarefied effect near the surface.Secondly,several validating tests are given to show the good resolution of the WENO-OS3 scheme and the feasibility of the Maxwell slip boundary conditions.Finally,hypersonic flows around the hollow cylinder truncated flare(HCTF)and the25°/55°sharp double cone are studied.Discussions are made on the characteristics of the hypersonic shock wave/boundary layer interactions with and without the consideration of the slip effect.The results indicate that the scheme has a good capability in predicting heat transfer with a high resolution for describing fluid structures.With the slip boundary conditions,the separation region at the corner is smaller and the prediction is more accurate than that with no-slip boundary conditions.
文摘为了研究高超声速流激波边界层干扰特性,选取HIFi RE-2(The Hypersonic International Flight Research Experimentation2)项目的高超声速流道为研究对象,采用k-ωSST模型在无燃油工况下模拟计算地面试验过程,所得计算结果与试验结果接近。在此基础上,分析激波边界层干扰过程、流动分离现象及入口马赫数对气动热影响。结果表明:随着入口马赫数增大,激波角变小,激波强度提高,在尾喷管中激波反射次数减少;随着入口速度增大,边界层分离区范围变小,回流区的位置逐渐向下游移动;加入气动耗散项后,流场的温度有一定升高,最大温升约为50 K。
