【作者】

Ulf Waldenmaier,Stefan Djuranec,Gunnar Stiesch

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。 For future gas and dual-fuel engines CFD-simulation methods. The easiest way to validate mixture formation is one of the most important devel-mixture formation simulation results is an indirect vali-opment areas to fulfill upcoming emission legislations dation with engine measurements. The validation is a and to improve combustion efficiency. Therefore MAN comparison of the simulated mixture formation quality Diesel & Turbo SE is optimizing the mixture forma-at start of ignition with engine measurements consid-tion of gas and dual-fuel engines with support of ad-ering emissions, knocking behavior and gas consump-vanced CFD-optimization techniques and single cylin-tion. For bigger variations this validation shows sur-der engine measurements. Today's CFD-optimization prisingly good agreement. Still investigating flow of an intake port with gas admission pipe is an it-tails and a direct validation of the mixture formation is erative process starting with an educated first guess not possible. Up to now no optical investigations con-design which has to be evaluated with simulation re-sidering mixture formation in the intake port for large sults and engine measurements. This evaluation is engines are known. To close this gap MAN Diesel base of the first optimization loop. The experience of & Turbo SE in cooperation with the Institut fuer Kol-the CFD-engineer is the optimization tool in that pro-benmaschinen of the Karlsruhe Institute of Technology cess. In general 4 to 5 iterations are necessary to im-have done PIV and Mie-scattering measurements on prove the mixture formation and flow behavior in the a modified flow bench for gas and dual-fuel engines.With this state of the art method it takes The measurements aimed on flow behavior and mix-about two weeks to reach the design target for mix-ture formation for different gas admission pipes and ture formation. With advanced CFD-simulation and intake valve seat rings for varying the flow behavior in optimization tools it is possible to get the best possi-the combustion chamber. The optical measurements ble design under consideration of the available design helped to rise the quality of CFD-simulation methods parameters within days. Nevertheless, the quality of and to improve the mixture formation of gas and dual-the CFD-optimization is directly linked to the quality of fuel engines to fulfill future emission legislation limits.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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