強制混合形CO_2GDLにおけるノズルの形状および出口静圧力比が小信号利得係数分布に与える影響

概要

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In order to evaluate essentially the effect of nozzle shape and experimental conditions on after-mixing GDLs' performance, we proposed measuring of gain profiles. In this experiment, to elucidate those effect on the transverse gain profile, we measured the transverse gain profile at several positions in the streamwise direction. We used several different nozzle shapes, and static pressure ratios of 1.25 and 4.65 at the CO_2-He and N_2 nozzle exits. A shock tube with two-dimensional nozzles was employed and the nozzles were as follows: (1) shock-free nozzles for N_2 and CO_2-He flows, (2) a shock-free nozzle for N_2 flow and a 30°angle wedge nozzle for CO_2-He flow, and (3) wedge nozzles of 60°angle for N_2 flow and 30°angle for CO_2-He flow. Our results show that the highest average gains were obtained with the nozzles of case (3). We can also confirm from the experiment that the measuring of gain profiles is one of the available ways for the evaluation.
一般社団法人日本機械学会の論文
1990-06-25