Thermodynamics Characteristic of the Flow and Heat Transfer in Rotating Cavity
Rotating cavity is a common and important part of Gas Turbine internal air system, cooling air is transported to cool cavity disks and guarantee the lifetime. The flow is dominated by centrifugal force and buoyancy force, which make the flow and heat transfer feature complex. Lots of experimental and numerical results show that the there are complex vortex structures. In order to investigate the flow and heat transfer characteristic in rotating cavities further, more numerical work are done in this paper. The heat transfer from the heated disks and the influence of through-flow are studied separately, the rotating cavity is treated as an open system from the point of thermodynamics system firstly. The results show that the flow in rotating cavity try to organize an orderly structure by consuming the energy from disks, but this process is disturbed by through flow. So the flow and heat transfer process seem to be followed by certain pattern such as repeatable vortices changing which is verified by many experimental and numerical researchs. As the system is not chaos, the upper and lower limits of heat transfer value at disk surfaces are possible to figure out. This can provide temperature design margin to the designers.
rotating cavity thermodynamics entropy
WU Kang REN Jing JIANG Hong-de
Department of Thermal Engineering,Tsinghua University,Beijing , China
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
232-239
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）