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|Other Titles: ||Numerical Investigation of 1.5-stage transonic compressor|
|Issue Date: ||20-Jun-2008|
The 1.5-stage transonic compressor, which is used in the 1.5-stage transonic compressor test rig, is investigated by the steady method and the unsteady method of CFD.At the steady part, the performance curves at six different rotational speeds are calculated. And the flow field in the compressor at the design speed is investigated. The results show that a detached bow shock appears at the upstream of the rotor near stall and the shock intensity is very high. Near stall, the flow separation occurs up 50% span of the rotor suction side, under 50% span of the stator and OGV suction sides and the separation is higher near the hub of the stator and OGV. At the design point, a bow shock appears near the leading edge of the rotor and its intensity is lower than the shock intensity near stall, and the flow state is quite well. At the choke condition, a bow shock is attached to the leading edge of the rotor and passage shocks appear in the passages of the rotor, the stator and OGV, and the flow separation occurs on the suction sides of the stator and OGV.At the unsteady part, the stator-OGV clocking effect and the IGV-stator clocking effect are investigated. The results show that there is a best clocking position between the stator and OGV and the efficiency at this clocking position is 0.44% higher than others. But the IGV-stator clocking effect is not significant and it just causes 0.0025% change. Besides, the gap between the stator and OGV can influence the best clocking position and the change curve between the gap and the best clocking position is got in the study.These conclusions can give advices to the compressor test rig build, such as making sure the probe positions and the laser window positions. Besides, the solution is a blind one and it can be compared with the experimental results, which can be got later, to test and calibrate the CFD code. And the work is good for the F-class gas turbine design platform build in China.
|Source URI: ||http://oaps.lib.tsinghua.edu.cn/handle/123456789/1387|
|Source Fulltext: ||http://oaps.lib.tsinghua.edu.cn/bitstream/123456789/1387/1/014%e4%bb%bb%e6%99%93%e6%a0%8b2004010669.pdf|
|Appears in Collections:||Outstanding Thesis of Undergraduate Students 本科生优秀毕业论文（2008）|
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