| Autor: |
Minsuk Choi, Dongha Hwang, Jehyun Baek |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
The KSFM Journal of Fluid Machinery. 17:27-36 |
| ISSN: |
2287-9706 |
| Popis: |
This paper presents a numerical investigation of the effect of the rotation speed on the performance in a transonic axial compressor with the dihedral stator. Four stator geometries with different stacking line variables were tested in the flow simulations over the whole operating range. It was found that a large shroud loss at the rotor outlet and the subsequent shroud corner separation in the stator passage occurred at low mass flow rate with the 100 % design speed. The hub dihedral stator could suppress the shroud loss region and consequently improve the stall margin. In case of the 70 % design speed condition as the mass flow rate decreased, it was seen that the high loss region was placed at the midspan of the rotor passage. The dihedral stator slightly affected the local diffusion factor, but the performance of the compressor was not changed. 1. 서 론 축류 압축기는 가스 터빈 엔진을 구성하는 중요한 요소 중 하나로 항공 분야 및 산업 전반에 걸쳐 두루 사용되고 있다. 이러한 압축기는 설계 제한조건 등이 매우 까다롭기 때문에 압축기 성능을 향상시키고 작동 영역을 확보하기 위해서는 내부 유동에 대한 자세한 연구가 필요하다. 압축기는 저유량 영역에서 날개 흡입면과 끝 벽 사이에서 코너 박리(corner separation)를 발생시키는데 이는 유로를 막아 손실을 발생시키고 작동 영역을 축소시키는 요인이 된다. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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