The Flow Analysis and Performance Improvement of the Flow Return System in High Pressure Fans

勤益科大機構典藏 > 工程學院 > 冷凍空調與能源系(所) > 【冷凍空調與能源系】期刊論文 > Item 987654321/7124

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題名:	The Flow Analysis and Performance Improvement of the Flow Return System in High Pressure Fans
作者:	陸紀文
貢獻者:	冷凍空調與能源系
日期:	2012-12
上傳時間:	2018-01-30 13:49:53 (UTC+8)
摘要:	This study numerically investigated the flow return system performances of two-stage high pressure fans. The parameters include inflow angle, length, exit width of vaneless diffuser and the blade number of deswirl vane. This study used the tested impeller to verify the accuracy of numerical calculations, with good consistency. The analytic results showed that the overall pressure loss of impeller and flow return system is effectively reduced when the inflow angle of vaneless diffuser is 15° and tangential to wheel velocity ratio is 0.46. A vaneless diffuser was required and its length referred to the maximum outer diameter of the volute casing. The performance of a contracted-wall vaneless diffuser was not improved over that of a parallel-wall one. The suggested number of blades in a deswirl vane was 12. The downstream affects the upstream in several areas inside the flow return system, thus, the flow return system must be calculated integrally.
關聯:	Int. J. Turbo Jet-Engines
顯示於類別:	[冷凍空調與能源系(所)] 【冷凍空調與能源系】期刊論文

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