Affiliation:
1. Thermalfluids, Department of Mechanical Engineering, Imperial College London, London SW7 2BX, UK
Abstract
Abstract
One-dimensional (1D) modeling is crucial for turbomachinery unsteady performance prediction and system response assessment. The purpose of the paper is to describe a newly developed 1D modeling (turbomachinery dynamic simulator (TURBODYNA)) for turbomachinery. Different from classic 1D modeling, in TURBODYNA, rotor has been meshed and its unsteadiness due to flow field timescale is considered. Instead of direct using of performances maps, source terms are added in Euler equation set to simulate the rotor. By comparing 1D modeling with three-dimensional (3D) computational fluid dynamics (CFD) results, it shows that rotor unsteadiness is indispensable for a better prediction. In addition, different variables response to pulse differently. In the rotor, mass flow is close to quasi-steady while entropy is significantly unsteady. TURBODYNA can capture these features correctly and provide an accurate prediction on pressure wave transportation.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference13 articles.
1. Modelling of a Turbocharger Turbine Under Pulsating Inlet Conditions;J. Power Energy,1996
2. Assessment of Unsteady Behavior in Turbocharger Turbines,2006
3. A Comparison of Timescales Within a Pulsed Flow Turbocharger Turbine,2012
4. Unsteady Evolution of Secondary Flows in a Mixed Flow Turbine,2017
5. Approximate Riemann Solvers, Parameter and Difference Schemes;J. Comput. Phys.,1981
Cited by
9 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献