Relative Deviation of Mass Flow Rate in Swirl Injectors due to the Engineering Tolerances: Experimental Study

다국어 초록 (Multilingual Abstract)

The accuracy of mass flow rate in injector depends upon the derivation of nozzle diameter (dc) and discharge coefficient (Cd). To compare the relationship between different dimensions of injectors, the relative variation mass flow rate through the injector is calculated according to the accuracy of high-class precision to get maximum relative deviation of mass flow rate. In this paper, the effect of engineering tolerances of three dimensions (nozzle diameter, depth of tangential channel and radius of twisting arm) on the mass flow rate of swirl injector was investigated through an experimental study. Then, the maximum relative deviation of mass flow rate (Δm˙/m˙)max between different swirl injectors was measured. The experimental results show that the (Δm˙/m˙)max was affected by the tolerances of nozzle diameter and depth of inlet channel greater than radius of twisting arm.

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