CAJ | 학술논문

汽轮机中二次水滴粒径大，容易造成叶片水蚀，降低汽轮机效率。但由于其数量少，测量困难，加大了研究的难度。在众多测量方法中，图像法具有同时测量二次水滴粒径、速度、方向和湿度等参数的优点。采用图像探针测量二次水滴，利用镜头参数确定测量区，提出根据水滴图像的模糊程度来确定该水滴是否处于测量区内，处理测量区内二次水滴，得到其粒度、速度和湿度等参数。通过实验室研究，得出模糊程度和颗粒的关系，并经过湿蒸汽模拟实验，计算出喷雾水滴的粒度和体积浓度，验证了该处理方法的有效性，为二次水滴的测量提供了一种新的思路。
기륜궤중이차수적립경대，용역조성협편수식，강저기륜궤효솔。단유우기수량소，측량곤난，가대료연구적난도。재음다측량방법중，도상법구유동시측량이차수적립경、속도、방향화습도등삼수적우점。채용도상탐침측량이차수적，이용경두삼수학정측량구，제출근거수적도상적모호정도래학정해수적시부처우측량구내，처리측량구내이차수적，득도기립도、속도화습도등삼수。통과실험실연구，득출모호정도화과립적관계，병경과습증기모의실험，계산출분무수적적립도화체적농도，험증료해처리방법적유효성，위이차수적적측량제공료일충신적사로。
The size of the coarse water in steam turbine is large but the number is small.And coarse water is the main factor which causes blade water erosion in steam turbine and also leads to loss in turbine stage efficiency.Among the methods of measuring coarse water,image method has the advantage of simultaneous measurement of the parameters of particle size,speed,direction and humidity.So,in the study the image probe was adopted to measure coarse water.The measurement volume was determined by the parameters of lens,moreover a new image method was proposed to find whether coarse water is in the measure area or not according to the blur degree and the calculated particle size,speed and humidity of coarse water in the measurement volume.And then the relationships between the blur degree of particle image and the particle parameters were obtained by experimental study.A wet steam simulation experiment was carried out to calculate the spray droplet size and volume concentration which verifies the effectiveness of the measurement. The study provides a new idea for coarse water measurement.