한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 1998년도 춘계 학술대회논문집
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- Pages.168-173
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- 1998
에어제트직기 주 노즐내 천음속 유동의 수치 해석적 연구
A Numerical Analysis of Transonic Flows in an Axisymmetric Main Nozzle of Air-Jet Loom
초록
A numerical analysis of axisymetric backward facing step main nozzle flow in air jet loom has been accomplished. To obtain basic design data for an optimum main nozzle for an air-jet loom and to predict the transonic/supersonic flow, a characteristic based upwind flux difference splitting compressible Navier-Stokes method has been used. The wall static pressure of the main nozzle and the flow velocity changes in the nozzle tube were analyzed by changing air tank pressures and acceleration tube lengths. The flow inside the nozzle experiences double choking one at the needle tip and the other at the acceleration tube exit at tank pressures over