CAJ | 학술논문

提出了一个一维模型来模拟柴油机排气微粒过滤器内部的流体动力学行为。在一维流体动力学模型中，将排气微粒过滤器简化成内部设有压降元件的直管，简化的直管通过突变的截面与排气管连接，直管中间的压降元件是数学意义上的一个面，没有厚度，但具有实际过滤器的全部阻力。此模型能够反映过滤器内所发生的主要现象，如压力损失、温度变化、压力波的反射与传播。此模型被添加到MK-14程序中后，能够精确预测发动机与管路系统之间的相互作用与相互影响。模型通过试验得到了验证。
제출료일개일유모형 래모의시유궤배기미립과려기내부적류체동역학행위。재일유류체동역학모형중，장배기미 립과려기간화성내부설유압강원건적직관，간화적직관통과돌변적절면여배기관련접，직관 중간적압강원건시수학의의상적일개면，몰유후도，단구유실제과려기적전부조력。차모형 능구반영과려기내소발생적주요현상，여압력손실、온도변화、압력파적반사여전파。차모 형피첨가도MK-14정서중후，능구정학예측발동궤여관로계통지간적상호작용여상호영향。 모형통과시험득도료험증。
The aim of this paper is to present a new and simple approach to the one-di mensional modeling of the global fluid-dynamic behavior of the trapper placed i n t he diesel exhaust system.The one-dimensional model simplifies the trapper as a straight tube contained a device with adiabatic pressure loss.The straight tube is linked with exhaust pipes by sudden area change.The device with adiabatic pre ssure loss is of all resistance of the trapper.This submodel is able to represen t the main phenomena taking place in the exhaust flow:mean pressure drop,mean te mperature variations and instantaneous pressure wave reflection and transmission ,and it can be linked to MK-14 code to predict the precise interaction and mutu al influences between engine and trapper.The results of the model have been expe rimentally validated with tests on engine in real running conditions.