基于求解可压缩流体的N-S方程,分别计算水及R134a两种液相工质在二维空间内的热声波产生及传递过程,分析初始压力及左侧壁温阶跃值对两种工质热声压力波产生的幅值及波传递到右边界后与壁面的热流交换影响情况.结果表明,初始压力对两种工质热声波产生的幅值及与向右边界换热的热流影响不大;压力幅值及右边界传热热流强度随左侧壁温度阶跃值增大而增大;在相同边界条件下,R134a可以产生更大幅值的压力波,并且与右边界换热的热流较大.
The generation and propagation of thermoacoustic waves in water and liquid R134a are investigated by solving the fully compressible form of the Navier-Stokes equations.A square enclosure filled with liquid working substance is considered as the computational domain.The effects of initial pressure and temperature values of rapidly heating the left wall on pressure peak and heat flux to the right wall are studied.The results show,the amplitude of pressure and heat flux to the right wall increase with bigger impulsive heating,the impact of initial pressure on them is small.The pressure peak and heat flux to the right wall are more bigger in R134a compared to these in water at the same boundary condition.
参考文献
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