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A modified streamwise body force model of fan with distorted inflow for rapid propulsion-airframe integrated simulation

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Chinese Journal of Aeronautics 2023年第12期36卷 202-213页

作者： Zhiping LI Yafei ZHANG Tianyu PAN Jian ZHANG National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China School of Energy and Power Engineering Beihang UniversityBeijing 100191China

Streamwise Body Force Model(SBFM)could be used to simulate the force of blade on the airflow,resulting in rapid propulsion-airframe integrated ***,when subjected to inlet distortion,the upstream flow field of fan stage is redistributed,which causes inaccurate prediction of fan stage *** inspired by the upstream influence of compressor,this paper aims to present a modification strategy for SBFM method to predict the compressor performance under circumferential inlet distortion without any knowledge of compressor *** on the linearized motion equation,the Upstream Influence Model(UIM)is introduced to predict the upstream flow field *** the theoretical Mach number at Aerodynamic Interface Plane(AIP)position is calculated and selected to determine the corresponding body force coefficients based on the functional relationship between body force coefficients and Mach number,thus the upstream influence of compressor could be accurately quantified and the Modified Streamwise Body Force Model(MSBFM)could be *** studied cases are calculated with different methods and the upstream flow fields are *** prediction error of MSBFM method for compressor adiabatic efficiency is less than 3%,and the calculation efficiency is improved 20 times under the condition of ensuring computing *** MSBFM method has the potential for rapid propulsion-airframe integrated simulation.

关键词： integrated simulation Streamwisebody force model Circumferential inletdistor-tion Upstream influence model Compressorperformance

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An integrated simulation method for PVSS parametric design using multi-objective optimization

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Frontiers of Architectural Research 2022年第3期11卷 509-526页

作者： Qing Gao Ying Yang Qian Wang School of Architecture Southeast UniversityNanjingChina China Construction Fifth Engineerins Division Corp Ltd ChangshaChina

An adequate strategy for achieving energy efficiency when designing a photovoltaic shading system(PVSS)shall find an equilibrium between sunlight heat gain and daylight trans-mittances through effective analysis tools in a building’s early design ***,traditional simulation methods are either time-consuming or lacking architectonical *** paper proposes a new method for architects to integrate thermal and daylighting performance by using parametric script modelling and optimize their balance with multi-objective optimization(MOO)algorithm in PVSS design.A case study was conducted to demonstrate the workflow of proposed integrated simulation method in PVSS design,and further compared the results with that of three single-objective optimizations under the same design *** findings show that the integrated framework is a feasible method for PVSS design and can be extended into the design of other advance shading system or building integrated photovoltaic.

关键词： integrated simulation PV shading System Parametric design Multi-objective optimization Thermal-daylighting balance

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An integrated assessment method of urban drainage system:A case study in Shenzhen City,China

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 150-156页

作者： Xin DONG Siyu ZENG Jining CHEN Dongquan ZHAO Department of Environmental Science&Engineering Tsinghua UniversityBeijing 100084China

In recent years,the urban drainage system in China is facing the dual pressure of renovation and *** requires that the integrated assessment for the planning and operation of the urban drainage system is *** evaluate the urban drainage system,an integrated assessment methodology based on the analytic hierarchy process(AHP),integrated simulation,and fuzzy assessment is *** method is a multi-criteria decision adding app roach to the assessment of the urban drainage system *** the integration of the Storm Water Management Model(SWMM),a simple wastewater treatment plant model,and a surface water quality model,an integrated modelling system for the urban drainage system is developed and applied as a key tool for *** the established method,a case study in Shenzhen City has been implemented to evaluate and compare two urban drainage system reno vation plans,the distributed plan and the centralized *** of the particularity of this case study,the established method is not applied *** the water environ mental impact,ecological impact,technological feasibility,and economic cost,the integrated performance of the distri buted plan is *** shown in this case study,the proposed method is found to be both effective and practical.

关键词： analytic hierarchy process(AHP) centralized plan distributed plan fuzzy assessment integrated assessment integrated simulation urban drainage system

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CFD ACTIVITIES IN AEROSPACE RESEARCH CENTER OF JAPANESE AEROSPACE EXPLORATION AGENCY

CFD ACTIVITIES IN AEROSPACE RESEARCH CENTER OF JAPANESE AERO...

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第四届亚洲CFD会议

作者： Toshiyuki IWAMIYA Information Technology Center Japanese Aerospace Exploration Agency 7-44-1 Jindaiji-Higashi-machi Chofu Tokyo 182-8522 Japan

＜正＞NAL, ISAS and NASDA were merged into Japan Aerospace Exploration Agency （JAXA） on Oct. 1, 2003. The former NAL’s activities on CFD have been succeeded in the activities of Aerospace Research Center （ARC） in JAXA. At NAL, the Numerical Simulator replaced its main computing engine NWT by a scalar processor based supercomputer with 9.3Tflop/s of peak performance and 3.6TB memory in October, 2002. The new computer system NSIII has been designed to promote the research and development activities of numerical simulation aiming at both precise evaluation of the performance and designing of future aircraft and spacecraft. This article describes the hardware and software of the NSIII and some topics of CFD activities executed at ARC.

关键词： Computational Fluid Dynamics Parallel Computing Numerical Simulator integrated simulation Aerospace Research and Development

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基于飞行气动载荷的固体火箭发动机内外传热一体化计算方法研究

基于飞行气动载荷的固体火箭发动机内外传热一体化计算方法研究

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第五届空天动力联合会议暨中国航天第三专业信息网第41届技术交流会

作者：李娟王小永王栋李鹏飞侯廉中国航天科工集团六院210所

本文基于ANSYS/Workbench平台,采用热流耦合方法,研究了一套飞行气动载荷下固体火箭发动机壳体内外传热计算方法,并对某发动机壳体结构在风洞考核试验条件下的温度场进行了仿真计算,获得了涂层表面和冷壁温度的变化过程,对比相应风洞试... 详细信息

本文基于ANSYS/Workbench平台,采用热流耦合方法,研究了一套飞行气动载荷下固体火箭发动机壳体内外传热计算方法,并对某发动机壳体结构在风洞考核试验条件下的温度场进行了仿真计算,获得了涂层表面和冷壁温度的变化过程,对比相应风洞试验测试结果,验证了算法的正确性。最后针对某发动机进行了在内传热、外气动热加热联合作用下的一体化数值模拟,获得了发动机壳体在飞行条件下的壳体内部温度场分布,仿真结果与试验结果一致,为发动机故障排除提供了理论依据。

关键词： solid rocket motor fluid-thermal interact internal and external heat transfer integrated simulation

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