AERODYNAMIC INVESTIGATION OF IMPINGEMENT COOLING IN A CONFINED CHANNEL WITH STAGGERED JET ARRAY ARRANGEMENT
This experimental study is part of the research supported by Rolls-Royce, plc. Research on better understanding of impingement cooling in confined channel is rarely found in the open literature. The main purposes of this project are to: (1) gain greater in-sight into the structure of impingement jet flow within a confined passage; (2) understand the effect of cross flow build up on the structure impingement jet flow; (3) get better understanding of the distribution of aerodynamic parameters along the passage. The test model is a confined channel with twelve staggered circular impingement holes. A single large size outlet hole was placed downstream on jet plate. Detailed flow field in passage were measured, the variation of flow field, flow distribution along the passage and discharge coefficient of jet holes with passage aspect ratio(Zr) and jet Reynolds number were studied. The experimental data show that effective jet impingement was available in the passage of Zr=1 and it was only available in the upstream region of passage of Zr=3 and 5. The impingement created secondary flow in the passage which caused high velocity flow moving to side and top walls. Strong effect of aspect ratio on aerodynamic parameters was only happened when Zr increased from 1 to 3. Reynolds number had slight influence on the flow fields and aerodynamic parameters.
Liu Haiyong Liu Songling Shen Tianrong You Shaokun Xu Duchun
School of Engine and Energy, Northwestern Polytechnical University Xian,710072,China
国际会议
昆明
英文
283-289
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）