Analysis of Heat Transfer in Cryogenic Regenerator Using Developed Code and Comparison of the Results with Simulation by FLUENT
Compact-sized, efficient cryo-coolers are widely used in missiles and other devices. The cooling performance of cryo-cooler largely depends on the regenerator and the cooling performance of regenerator depends on non-dimensional parameters, namely heat transfer unit (NTU), heat capacity ratio, thermal losses due to longitudinal conduction etc. A code has been developed to analyze the energy balance of the fluid and matrix and solve the equations using Parallel-Flow model for both ideal and non-ideal regenerators. The effects of nondimensional parameters on inefficiency were found out quantitatively through the developed code. For comparison, porous media simulation by commercial solver FLUENT was also done. The results generated by the code (temperature profile, heat transfer and inefficiency) were in good agreement with those of FLUENT simulations as well as the data documented in the literature. Thus, the developed code can be used as a tool for initial design of cryocoolers and optimizing the performance by selecting the matrix material, temperature swing, NTU, porosity etc.
Cryogenic Regenerator NTU Heat Capacity Ratio Heat Transfer
Saifur Rahman Bakaul
Institute of Fluid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China Institute of Avionics and Aeronautics, Air University, Islamabad 44000, Pakistan
国际会议
2011年亚太航空航天技术学术会议(APISAT 2011)
澳大利亚
英文
1-9
2011-02-28（万方平台首次上网日期，不代表论文的发表时间）