CAJ | 학술논문

为了准确测量汽轮机末级蒸汽湿度及其空间分布,本文提出用CCD测量湿蒸汽的散射光强分布,并通过数值拟合得到汽轮机内部的蒸汽湿度和水滴直径.根据CCD成像规律以及散射光强的分布特点,建立了包括测量系统、汽轮机模拟系统在内的实验平台.用532 nm的激光照射湿蒸汽,CCD拍摄得到2.6°～6.6°角度变化范围内的散射光强分布,并通过数值拟舍得到蒸汽相对湿度变化范围0.7%～1.2%、水滴平均直径大小为1.4～1.6μm.实验结果表明:该测量方法可以用来测量汽轮机末级蒸汽湿度和水滴直径,并且实现了较大范围内散射光测量.实验结果直观地反映了汽轮机内部蒸汽湿度的变化规律,从而有力地证明CCD应用在蒸汽湿度测量中的可行性.
위료준학측량기륜궤말급증기습도급기공간분포,본문제출용CCD측량습증기적산사광강분포,병통과수치의합득도기륜궤내부적증기습도화수적직경.근거CCD성상규률이급산사광강적분포특점,건립료포괄측량계통、기륜궤모의계통재내적실험평태.용532 nm적격광조사습증기,CCD박섭득도2.6°～6.6°각도변화범위내적산사광강분포,병통과수치의사득도증기상대습도변화범위0.7%～1.2%、수적평균직경대소위1.4～1.6μm.실험결과표명:해측량방법가이용래측량기륜궤말급증기습도화수적직경,병차실현료교대범위내산사광측량.실험결과직관지반영료기륜궤내부증기습도적변화규률,종이유력지증명CCD응용재증기습도측량중적가행성.
In order to accurately measure the steam moisture and droplet size, a new method is proposed to measure the light scattering in steam turbine, and by optimal numerical fitting, we can get the value of steam moisture distribution and droplet size. According to the characteristic of CCD imaging and light scattering theory, the experimental platform including the measurement system and simulation system of steam turbine is set up. The laser with the wavelength of 532nm is adopted to irradiate the moisture gas, and the light scattering distribution by the scale of 2.6°-6.6° is measured by CCD, so the steam moisture distribution(0.7% ～1.2%) and average droplet size(1.4～1.6μm) can be calculated by curve fitting. The experimental results indicate that this method can he used to measure steam moisture and droplet size, and the large scale can be achieved by using CC.D. Furthermore, the experimental results also vividly reflect the varying rule of steam moisture and droplet size, so the feasibility of application of CCD technology in measure of steam moisture is supported strongly.