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基于容积法的某涡扇发动机动态建模方法 被引量:10
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作者 唐世建 童万军 《航空动力学报》 EI CAS CSCD 北大核心 2013年第3期709-713,共5页
考虑了容腔的质量和能量的储能效应,提出了基于容积法的涡扇发动机实时数学模型建模方法,建立了容腔压力和温度的微分方程,容腔的压力和温度可以用不迭代的数值法求解.同时,利用C++面向对象编程语言,建立了某涡扇发动机动态模型.用建立... 考虑了容腔的质量和能量的储能效应,提出了基于容积法的涡扇发动机实时数学模型建模方法,建立了容腔压力和温度的微分方程,容腔的压力和温度可以用不迭代的数值法求解.同时,利用C++面向对象编程语言,建立了某涡扇发动机动态模型.用建立的发动机动态模型和商用软件Gasturb 10分别计算了发动机性能,并进行了对比,结果表明:该模型与Gasturb 10的运算结果具有良好的一致性,高压压气机转速、涡轮进口温度及压气机喘振裕度的响应结果最大相对误差小于1%.容积法避免了数值迭代,可以保证模型计算的实时性. 展开更多
关键词 容积法 涡扇发动机 发动机动态建模 方法 实时
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Fluid dynamic modeling of junctions in internal combustion engine inlet and exhaust systems 被引量:13
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作者 David Chalet Pascal Chesse 《Journal of Thermal Science》 SCIE EI CAS CSCD 2010年第5期410-418,共9页
The modeling of inlet and exhaust systems of internal combustion engine is very important in order to evaluate the engine performance.This paper presents new pressure losses models which can be included in a one dimen... The modeling of inlet and exhaust systems of internal combustion engine is very important in order to evaluate the engine performance.This paper presents new pressure losses models which can be included in a one dimensional engine simulation code.In a first part,a CFD analysis is made in order to show the importance of the density in the modeling approach.Then,the CFD code is used,as a numerical test bench,for the pressure losses models development.These coefficients depend on the geometrical characteristics of the junction and an experimental validation is made with the use of a shock tube test bench.All the models are then included in the engine simulation code of the laboratory.The numerical calculation of unsteady compressible flow,in each pipe of the inlet and exhaust systems,is made and the calculated engine torque is compared with experimental measurements. 展开更多
关键词 compressible flow gas dynamics pressure wave propagation discharge coefficient internal combustion engine CFD simulation
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