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Interaction of Nonlinear Dynamics and Unsteady Flow in Fuel Injectors
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English
Abstract
Rapid opening, closing and rebounds of needle from seat and stopper plate give rise to fluid transients in fuel injectors, which are strongly coupled to the dynamics of needle and body motions. A mathematical model, based on unsteady compressible flow in the injector and steady incompressible flow in inlet and outlet section in conjunction with the equation of motion for needle and body, allows the quantitative description of the injector operation cycle. Agreement between prediction and experiment in terms of needle motion, needle velocity and pressure history is good. The mathematical model is used to show the effects, which various contributions to the hydrodynamic interaction force have on the needle motion, on pressure history and on injected mass.
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Citation
Spurk, J., Betzel, T., and Simon, N., "Interaction of Nonlinear Dynamics and Unsteady Flow in Fuel Injectors," SAE Technical Paper 920621, 1992, https://doi.org/10.4271/920621.Also In
References
- Greiner, M. Romann, P. Steinbrenner, U. BOSCH fuel injectors - new developments SAE Paper 870124 1987
- Wylie, E. B. Streeter, V. L. Fluid Transients McGraw Hill NewYork, London, Toronto 1978
- Pinkus, 0. Sternlicht, B. Theory of Hydrodynamic Lubrication McGraw Hill NewYork, London, Toronto 1961