| Autor: |
Huang, Taotao, Caughley, Alan |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 6/8/2012, Vol. 1434 Issue 1, p1217-1225, 9p, 3 Diagrams, 5 Graphs |
| Abstrakt: |
Industrial Research Ltd has developed a diaphragm based low-cost pressure wave generator technology for Stirling and pulse tube cryogenic refrigerators. To quickly design and optimize a refrigerator based on a diaphragm pressure wave generator, onedimensional analysis plays a very important role. However, due to the large cross-section change between the pressure wave generator and the heat exchanger, one-dimensional design code can't give accurate results without adjusting empirical heat transfer and friction coefficients. Therefore, multi-dimensional analysis is needed to verify onedimensional results and determine empirical coefficients. In our previous work, a twodimensional axisymmetric Computational Fluid Dynamics (CFD) model was developed to simulate oscillating fluid flow and heat transfer in a diaphragm pressure wave generator and validated by a series of validation experiments. In this study, the validation experiments were modeled using Sage commercial code. Results obtained from the Sage model were compared with those from CFD simulations and validation experiments. We present the results to assist to determine the empirical heat transfer coefficients in Sage for the cases with great cross-section change between a pressure wave generator and a heat exchanger. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
