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为了准确进行地面热平衡实验，验证载人飞船座舱热控制设计，运用相似理论对载人飞船座舱内空气的对流换热进行了相似分析，确定了地面热平衡实验时保持座舱内空气的对流换热与太空飞行时相似的准则是：“降低座舱中的空气压力，保持Ｇｒ相同，同时保持空气的质量流量及边界条件相同。”根据技术条件限制，提出了地面热平衡实验时座舱内空气对流换热的近似模拟方案，阐述了近似实验时座舱内空气状态的确定方法。通过数值求解一个简单的物理模型，说明了近似模拟实验方案的可行性。
In order to accurately carry out the experiment of surface heat balance and verify the thermal control design of the manned spacecraft cabin, the similar theory was used to analyze the convection heat transfer of the air in the manned spacecraft cabin, and to determine the convection heat transfer and A similar guideline for space flight is to “reduce the air pressure in the cockpit and keep the Gr the same while keeping the mass flow and boundary conditions of the air the same.” According to the technical constraints, the air convection heat transfer in the cockpit Approximate simulation program, expounds the approximation experiment cockpit air condition determination method. By solving a simple physical model numerically, the feasibility of an approximate simulation experiment is demonstrated.