汽轮机技术
汽輪機技術
기륜궤기술
TURBINE TECHNOLOGY
2013年
5期
359-360,372
,共3页
张成义%张宏涛%冯永志%李长宝
張成義%張宏濤%馮永誌%李長寶
장성의%장굉도%풍영지%리장보
叶顶间隙%轴流压气机%数值模拟%气动性能
葉頂間隙%軸流壓氣機%數值模擬%氣動性能
협정간극%축류압기궤%수치모의%기동성능
tip clearance%axial compressor%numerical simulation%aerodynamic performance
以某F级燃气轮机的轴流压气机的3级典型级为研究对象,采用全三维数值模拟方法分析了3种叶顶间隙情况下压气机的内部流动。数值研究结果表明:叶顶间隙大小对压气机的性能影响比较显著,随着间隙的增加,压气机的压比、效率等性能明显下降;同时,由于叶顶间隙内泄漏涡的扰动,对机匣壁面、叶顶附近叶片表面的静压分布有较大的影响。
以某F級燃氣輪機的軸流壓氣機的3級典型級為研究對象,採用全三維數值模擬方法分析瞭3種葉頂間隙情況下壓氣機的內部流動。數值研究結果錶明:葉頂間隙大小對壓氣機的性能影響比較顯著,隨著間隙的增加,壓氣機的壓比、效率等性能明顯下降;同時,由于葉頂間隙內洩漏渦的擾動,對機匣壁麵、葉頂附近葉片錶麵的靜壓分佈有較大的影響。
이모F급연기륜궤적축류압기궤적3급전형급위연구대상,채용전삼유수치모의방법분석료3충협정간극정황하압기궤적내부류동。수치연구결과표명:협정간극대소대압기궤적성능영향비교현저,수착간극적증가,압기궤적압비、효솔등성능명현하강;동시,유우협정간극내설루와적우동,대궤갑벽면、협정부근협편표면적정압분포유교대적영향。
The internal flow fields of three representative stages of a Fclass gas turbine axial -flow compressor was numerically simulated with three-dimensional CFD under three different tip clearance size .The results of numerical analysis show that with the increase of tip clearance size , the performance of three stage compressor change obviously , the performance parameters such as efficiency ,pressure ratio tended to decrease obviously;Meanwhile ,the distribution of static pressure on surface of the compressor casing and the blade surface near the tip because of the existence of leakage vortex .