非正交界面下的插值耦合传热方法
发布时间：2018-09-18 06:44
【摘要】：针对复杂热防护结构,开发了一种求解非正交性流/固界面的耦合传热程序。流体和固体区域采用同一积分、守恒型的RANS(Reynolds-Averaged Navier-Stock)方程,通过有限体积法进行离散求解。为了保证非正交界面上的温度和热流密度连续,提出了一种结合网格周边信息计算界面热流密度的插值方法。利用该插值耦合方法模拟了双层复合平板和喷管的热传导。数值结果表明:该插值方法在空间上具有2阶精度;喷管壁面上的对流换热系数沿轴向先增大后减小,在喉部上游达到最大值,当喷管入口压力增加3.38倍时,对流换热系数的最大值相应增加了3.13倍;喉衬与壳体界面上温度的计算值和试验结果存在一定差异,这是由于本文数值计算未考虑接触热阻引起的。
[Abstract]:A coupled heat transfer program for solving nonorthogonal flow / solid interface is developed for complex thermal protection structures. The RANS (Reynolds-Averaged Navier-Stock) equation of the same integral and conservation type is used in the fluid and solid regions. The solution is discretized by the finite volume method. In order to ensure the continuity of temperature and heat flux on non-orthogonal interface, an interpolation method is proposed to calculate the heat flux density of interface by combining the information of grid periphery. The interpolation coupling method is used to simulate the heat conduction of double layer composite plate and nozzle. The numerical results show that the interpolation method has the second order accuracy in space, the convection heat transfer coefficient on the nozzle wall increases first along the axial direction, then decreases, and reaches the maximum value in the upper part of the throat. When the nozzle inlet pressure increases 3.38 times, The maximum value of convection heat transfer coefficient increases by 3.13 times, and the calculated temperature at the interface between the throat lining and the shell is different from the experimental results, which is due to the fact that the contact thermal resistance is not taken into account in the numerical calculation in this paper.
【作者单位】： 南京理工大学机械工程学院;
【分类号】：V430;TK471
本文编号：2247101
[Abstract]:A coupled heat transfer program for solving nonorthogonal flow / solid interface is developed for complex thermal protection structures. The RANS (Reynolds-Averaged Navier-Stock) equation of the same integral and conservation type is used in the fluid and solid regions. The solution is discretized by the finite volume method. In order to ensure the continuity of temperature and heat flux on non-orthogonal interface, an interpolation method is proposed to calculate the heat flux density of interface by combining the information of grid periphery. The interpolation coupling method is used to simulate the heat conduction of double layer composite plate and nozzle. The numerical results show that the interpolation method has the second order accuracy in space, the convection heat transfer coefficient on the nozzle wall increases first along the axial direction, then decreases, and reaches the maximum value in the upper part of the throat. When the nozzle inlet pressure increases 3.38 times, The maximum value of convection heat transfer coefficient increases by 3.13 times, and the calculated temperature at the interface between the throat lining and the shell is different from the experimental results, which is due to the fact that the contact thermal resistance is not taken into account in the numerical calculation in this paper.
【作者单位】： 南京理工大学机械工程学院;
【分类号】：V430;TK471
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，本文编号：2247101
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