An Experimental Study on Particle Collection Efficiency of the Slit Impactor

슬릿 임팩터의 입자 포집 효율에 관한 연구

In this experimental study, relative particle size distribution was measureed at the inlet and outlet of the slit impactor using the particle sizer. The imployed measuring method of the size distribution was different from the conventional method. This measurement system has the advantage of obtaining the particle collection efficiency for various particle size easily and at once compared with other methods. The effects of jet to plate distance and Reynolds number on the characteristic impactor efficiency curves have been studied. In the results of this experiment, the increment of collection efficiency was observed as Reynolds number increases in the case of S/W = 1/2 but was very slight. The influence of S/W is more remarkable than that of Reynolds number on the particle collection efficiency.

본 실험에서는 종래와는 달리 먼저 입출구 부분에서 입자분포 측정장치를 이용하여 실험함으로써 여러 가지 입자크기에 대하여 동시에 효율을 구할 수 있는 장치를 구성하고 앞에서 열거한 여러 가지 실험인자중 레이놀즈수와 S/W를 변화시키면 서 일단 슬릿 임팩터(one-stage slit impactor)의 효율을 .root.Stk에 따라 구하여 일단 임팩터 뿐만 아니라 다단 임팩터(multistage impactor)에 대한 설계기초자료를 마련하 고자 한다.