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

NCUTIR > College of Engineering > Department of Refrigeration & Air Conditioning > 【冷凍空調與能源系】期刊論文 > Item 987654321/7125

Please use this identifier to cite or link to this item: http://ir.lib.ncut.edu.tw/handle/987654321/7125

Title:	The Flow Analysis and Performance Improvement of the Flow Return System in High Pressure Fans
Authors:	黃建民
Contributors:	冷凍空調與能源系
Date:	2012-12
Issue Date:	2018-01-30 13:51:30 (UTC+8)
Abstract:	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. Keywords: High pressure fan; flow return system; drag coefficients; performance improvement; CFD
Relation:	International Journal of Turbo & Jet-Engines
Appears in Collections:	[Department of Refrigeration & Air Conditioning] 【冷凍空調與能源系】期刊論文

Files in This Item:

There are no files associated with this item.

View Licence