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| Numerical Analysis of Slots Structure for Film Cooling on Ejector Systems of Marine Exhaust Device |
| Received:February 20, 2012 Revised:August 15, 2012 |
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| DOI： |
| KeyWord:exhaust ejector diffuser pipe cooling gas film |
| Author | Institution |
| YUAN Xiao-chuan |
College of mechanical and power engineering， Shanghai Jiao Tong University， Shanghai ， China |
| BAI Zhong-xiang |
College of mechanical and power engineering， Shanghai Jiao Tong University， Shanghai ， China |
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| Abstract: |
| The exhaust temperature of marine gas turbine is very high. In order to reduce infrared radiation in exhaust pipe and exhaust plume, an ejector device is needed to be installed above the exhaust pipe. The temperature of exhaust gas is reduced by suction of cold air and a cooling gas film on pipe wall to prevent temperature rise. The diffuser pipe of the ejector device is composed of multilevel ring structure. Numerical simulation was applied to simulate the influence of multilevel ring structure on the temperature of pipe wall. The wall temperature distribution and length of cooling gas film was obtained. The purpose was to provide reference for design of diffuser pipe. |
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