本文用数值计算方法,分别求解了Van der Waals气体在给定喷管中的等熵,等温无激波流动,并将结果与用完全气体状态方程所获得的计算结果进行比较,分别得到了等熵、非等熵情况下完全气体假设对真实气体的偏差。本文所得的结论对冷冻风洞...本文用数值计算方法,分别求解了Van der Waals气体在给定喷管中的等熵,等温无激波流动,并将结果与用完全气体状态方程所获得的计算结果进行比较,分别得到了等熵、非等熵情况下完全气体假设对真实气体的偏差。本文所得的结论对冷冻风洞、高超音速风洞技术的发展以及火箭发动机的设计等都有一定的指导意义。展开更多
A new model is established to describe heat exchanging of the incompletely mixed fluid flowing in the tubes and the unmixed fluid crossing out of the tubes in the heat-exchangers especially in air cooler. In the model...A new model is established to describe heat exchanging of the incompletely mixed fluid flowing in the tubes and the unmixed fluid crossing out of the tubes in the heat-exchangers especially in air cooler. In the model, a new method of analyzing volume is proposed to develop the temperature distribution equations of the two fluids --tw（x） and ta（X,,7＂）. With tw（x） and ta （x, ,7）, the curves of the temperature distribution of the two fluids can be obtained. Also tw（x） and ta（x,n） can be used to calculate parameters of structure of an air cooler and to improve performances of it.展开更多
文摘本文用数值计算方法,分别求解了Van der Waals气体在给定喷管中的等熵,等温无激波流动,并将结果与用完全气体状态方程所获得的计算结果进行比较,分别得到了等熵、非等熵情况下完全气体假设对真实气体的偏差。本文所得的结论对冷冻风洞、高超音速风洞技术的发展以及火箭发动机的设计等都有一定的指导意义。
文摘A new model is established to describe heat exchanging of the incompletely mixed fluid flowing in the tubes and the unmixed fluid crossing out of the tubes in the heat-exchangers especially in air cooler. In the model, a new method of analyzing volume is proposed to develop the temperature distribution equations of the two fluids --tw（x） and ta（X,,7＂）. With tw（x） and ta （x, ,7）, the curves of the temperature distribution of the two fluids can be obtained. Also tw（x） and ta（x,n） can be used to calculate parameters of structure of an air cooler and to improve performances of it.
