Numerical Investigation of Flow and Heat Transfer in the 7×7 Multi-channel of CC Primary Surface Recuperators
The investigations on the three-dimensional steady laminar flow and heat transfer characteristics for the 7×7 multi-channel with the sine-wave crossed-corrugated primary surface are conducted using numerical simulation in this paper. Comparing the results with those obtained from 5×5 multi-channel, we find that the results from 7×7 multi-channel are more approaching to the experiment’s results, and the relative error is much less than that from 5×5 cells’. Besides, a complete analysis on the flow and heat transfer performance from 0 to 90 degrees are supplemented in this paper. And the effects of the different ratio of the wave length P to height H (P/H) on the flow and heat transfer performance are studied simultaneously. The results show that, under the condition of the same P/H, Nusselt number (Nu) and friction factor (f) increase with the increasing θ. Nu increases when the Reynolds (Re) enhances, while f decreases. In addition, Nu ascends with the enhancing P/H when it is between 1 and 3, while f has nearly no change. But they both descend when it is between 3 and 4. With the comprehensive consideration of all aspects, the recuperator with better performance is optimized and designed.
CC primary surface recuperator Flow Heat transfer Numerical simulation
Yanyan Liu Wei Wang
School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
国际会议
2007杭州国际动力工程会议(The International Conference on Power Engineering 2007)
杭州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）