CAJ | 학술논문

为了准确测量旋转射流的三维分速度，该文着重研究了激光多普勒测速仪（LDA ）的三维测试技术，通过实测数据和数值模拟，对比分析了同时具有发射和接收功能的一维和二维探头的位置关系、射流外围玻璃窗的影响、非协同测量模式的选择、有效数据率等问题。研究表明，在带有玻璃观测窗口的有限空间射流测量中，两探头宜采用后向接收布局，而L型布局测得分速度有一定的偏移，需要做多次的测试获取校正参数。为准确地三维速度的测试提供参考。
위료준학측량선전사류적삼유분속도，해문착중연구료격광다보륵측속의（LDA ）적삼유측시기술，통과실측수거화수치모의，대비분석료동시구유발사화접수공능적일유화이유탐두적위치관계、사류외위파리창적영향、비협동측량모식적선택、유효수거솔등문제。연구표명，재대유파리관측창구적유한공간사류측량중，량탐두의채용후향접수포국，이L형포국측득분속도유일정적편이，수요주다차적측시획취교정삼수。위준학지삼유속도적측시제공삼고。
To accurately measure the three-dimensional component velocity of swirling jet ,this paper focuses on the three-dimensional Laser Doppler Velocimetry (LDA ) testing technology ,according to experimental data and numerical simulation results ,and comparatively analyses the positional relationship of one-dimensional probe and two-dimensional probe with transmitting and receiving functions , the impact of the swirling jet external glazing ,the choice of non-cooperative measurement mode ,and the problems of effective rate of data . The investigation shows that in a limited space with a glass observation window in swirling jet experimental device ,the backward pattern of two probes should be adopted ,the reason is that the measurement component velocity of L-shaped pattern has somewhat shifting , it needs to do many experiments for correction parameters ,and acquires reference data for accurate three-dimensional velocity .