CAJ | 학술논문

建立了一种新型的非接触式压敏涂料(Pressure Sensitive Paint,PSP)测压系统,设计了一套可拆卸式毫米级平面叶栅实验段,首次应用PSP测压技术测量了有/无叶尖间隙毫米级叶栅叶背表面静压分布.结果表明:由于存在叶尖间隙,叶盆处高压气体通过间隙泄漏流入叶背,使叶背叶尖处压力明显大于叶根处;与无叶尖间隙相比,有间隙时泄漏对叶背表面压力的影响约占叶高1/3,叶背底端受泄漏的影响较小.
건립료일충신형적비접촉식압민도료(Pressure Sensitive Paint,PSP)측압계통,설계료일투가탁사식호미급평면협책실험단,수차응용PSP측압기술측량료유/무협첨간극호미급협책협배표면정압분포.결과표명:유우존재협첨간극,협분처고압기체통과간극설루류입협배,사협배협첨처압력명현대우협근처;여무협첨간극상비,유간극시설루대협배표면압력적영향약점협고1/3,협배저단수설루적영향교소.
A novel non-contact pressure measurement system of pressure sensitive paint (PSP) was established. One set of test section of millimeter level plane cascade which can be dis-assembled was designed. The surface pressure of blade suction side with and without tip clearance was measured using PSP technology for the first time. The results show that, because of tip clearance, the blade pressure side gas leaks into the suction side through tip clearance and the surface pressure of the top of blade suction side is bigger than it of the bottom. Contrast with the condition of no tip clearance, leakage has significant impact on the pressure on one third of the blade span of suction side, but little on the bottom of suction side.