| NUMERICAL STUDY ON CAVITATION FLOW CHARACTERISTICS IN DIESEL FUEL INJECTOR CONTROL VALVE
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| Jingbin Liu 1, Zhenming Liu 1, Jiechang Wu 1, Xiaolei Gu 2 |
1College of Power Engineering, Naval University of Engineering
2FAW Wuxi Fuel Injection Equipment Research Institute |
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| ABSTRACT |
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The flow and cavitation in the flow passage of the control valve are calculated, and the effects of operating
conditions (including injection pulse width, rail pressure and ball valve lift) on the flow and cavitation characteristics are
analyzed under dynamic boundary conditions. The simulation results show that the cavitation in the outflowing
control-orifice (OA) and the guide-hole are almost unaffected by these operating conditions. In contrast, the cavitation
process in the ball valve chamber has two distinct stages, which can be classified as violent and relatively smooth. The shorter
the pulse width, the more severe the average degree of cavitation in the ball valve chamber; however, the risk of cavitation
erosion on the ball valve and the ball valve seat surface does not increase too much. The increase of rail pressure and the
increase of ball valve lift will aggravate the cavitation, and the cavitation position will move forward closer to the sealing
annular surface. |
| Key Words:
uel injector, Control valve, Cavitation, Numerical simulati |
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Corresponding Author.
Zhenming Liu , Email. 
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