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建立了描述上半周加热、下半周绝热不均匀热流边界条件下的水平管内受迫层流与自然对流叠加的混合对流换热的数学模型。该模型考虑了管壁导热和流体的变物性，研究了不同流体（水和乙二醇水溶液）、不同热流方向对对流换热的影响。同时也进行了上半周加热、下半周绝热边界条件下的水平管内混合对流换热的实验研究。理论和实验研究的结果都表明了，重力场对水平管内流体层流对流换热的影响，为在地面重力场中进行模拟太空微重力环境中的空间辐射器的传热实验研究提供了必要的理论和实验依据。
A mathematical model describing the mixed convective heat transfer in forced horizontal laminar flow and natural convection superimposed in the first half of the week with the adiabatic non-uniform heat flow boundary conditions was established. The model considers the thermal conductivity of the pipe wall and the fluid properties. The effects of different fluids (water and ethylene glycol) and different directions of heat flux on convective heat transfer are studied. At the same time, the experimental study on the mixed convection heat transfer in the horizontal tube under the adiabatic boundary condition in the first half of the week was conducted. Both theoretical and experimental results show that the influence of gravity field on the convective heat transfer in a horizontal tube laminar flow provides an important theoretical basis for the experimental study of heat transfer in space gravitational field Theoretical and experimental basis.