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Design Sensitivity Estimation of Injector Nozzle Hole Considering Cavitation

캐비테이션에 관한 인젝터 노즐 홀의 설계민감도 평가

  • 염정국 (동아대학교 기계공학과) ;
  • 하형수 (동아대학교 기계공학과)
  • Received : 2013.04.08
  • Accepted : 2013.08.11
  • Published : 2013.11.01

Abstract

This study performs a computational fluid dynamics (CFD) analysis of the inner flow of a multihole injector nozzle by using ANSYS CFX 13.0. Based on the obtained results, a design of experiment (DOE) was performed and applied to investigate the effects of injector nozzle design parameters on cavitation. To analyze the design sensitivity and signal-to-noise ratio (S/N ratio), the hole diameter, hole length, hole angle, and K-factor of the nozzle hole were selected as design parameters, and the effect of these parameters was investigated at 16 experimental points. Consequently, it was found that the effect of the K-factor on the cavitation and inner flow of the injector nozzle is the greatest. Thus, the selection of a suitable K-factor is important in nozzle design considering cavitation flow.

Keywords

Cavitation;Design of Experiment;K-factor;Nozzle;Simulation

Acknowledgement

Supported by : 한국연구재단

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