Research on the volume-based fully coupled method of the multi-fidelity engine simulation

Jia, Zihao; Tang, Huazhong; Jin, Donghai; Chen, Min; Li, Shulei; Heng, Liuxiao

doi:10.1016/j.ast.2022.107429

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…Numerical zooming is a computational approach used in aero engine design and analysis to study the flow characteristics in specific regions of interest within the engine (Jia et al, 2022;Xu et al, 2022;Yang et al, 2022;Zheng et al, 2023). The Cycle with CFD in it (CWCFD) method in numerical zooming involves integrating multiple models with varying fidelity and complexity into a full engine simulation.…”

Section: Introductionmentioning

confidence: 99%

Direct multi-fidelity integration of 3D CFD models in a gas turbine with numerical zooming method

Deng,

Wei,

et al. 2024

J. Glob. Power Propuls. Soc.

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Multi-fidelity simulation improves the simulation accuracy and captures more detailed information about aero engines under limited computing resources, which is implemented by coupling different levels of models using numerical zooming methods. However, there is an obvious problem in traditional zooming methods such as the iterative coupled zooming method or mini-map method: both the convergence and accuracy depend highly on the component general characteristic maps. Based on the investigation of a micro gas turbine, a direct zooming method (Cycle with CFD in it, CWCFD) is developed. It directly embeds the 3D CFD compressor and turbine model into a 0D component-level model without component general characteristic maps. Then, the CWCFD zooming method is compared with the traditional 0D component-level model in terms of the throttle characteristics of the micro gas turbine, and the experimental data of the ground test is performed to verify the effectiveness of the CWCFD zooming methods. The results indicate that the CWCFD zooming method matches well with the test data better than the traditional 0D component-level model.

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Section: Introductionmentioning

confidence: 99%

Direct multi-fidelity integration of 3D CFD models in a gas turbine with numerical zooming method

Deng,

Wei,

et al. 2024

J. Glob. Power Propuls. Soc.

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show abstract

“…According to the dimension of the mathematical model, the numerical simulation method can be divided into the following four levels: the 0D method based on the thermal cycle and data model of component's characteristics [1,2]; the 1D method based on ordinary differential equations (ODE) [3,4] or partial differential equations (PDE) [5]; the 2D method based on through-flow theory [6][7][8][9]; the 3D method based on the Navier-Stokes(N-S) equation [10][11][12][13]. Other trans-dimensional methods, otherwise known as multi-fidelity methods, were also reported as the a compromise between low-dimensional (0-2D) and 3D methods [14][15][16]. Although the numerical simulation method based on the low-dimensional models has great advantages in terms of computational efficiency, it relies highly on experimental data, empirical formulas or other remedies to correct the model with the dimensional reduction.…”

Section: Introductionmentioning

confidence: 99%

Power Balance Strategies in Steady-State Simulation of the Micro Gas Turbine Engine by Component-Coupled 3D CFD Method

Xu,

Gao,

Cao

et al. 2023

Aerospace

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Currently, an increasing number of designers have begun to pay attention to a new paradigm for evaluating the performance with full engine 3-dimensional computational fluid dynamics (3D CFD) simulations. Compared with the traditional component-based performance simulation method component-based performance simulation method (‘component-matched’ method), this novel ‘component-coupled’ method can evaluate the overall performance of the engine more physically and obtain more detailed flow field parameters simultaneously. Importantly, the power balance iteration should be introduced to the novel method to satisfy the constraints of the coaxial components for the gas turbine engine at steady state. By carrying out the ‘component-matched’ simulation and the ‘component-coupled’ simulation for a micro turbojet engine, the necessity of introducing the power balance iteration was discussed in this paper. The influence of steady-state co-working constraints on the engine performance was analysed and strategies for power balance iteration were proposed. To verify the capability and feasibility of this method, not only the co-working state but also the windmill state of the gas turbine engine were simulated by using the 3D CFD method considering power balance iteration. The results show that the power balance strategy proposed in this paper can converge the aerodynamic parameters as well as the power residual in a robust way.

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Multi-Fidelity Simulation of Gas Turbine Overall Performance by Directly Coupling High-Fidelity Models of Multiple Rotating Components

Deng,

Xu,

et al. 2024

J. Therm. Sci.

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Research on the volume-based fully coupled method of the multi-fidelity engine simulation

Cited by 7 publications

References 29 publications

Direct multi-fidelity integration of 3D CFD models in a gas turbine with numerical zooming method

Direct multi-fidelity integration of 3D CFD models in a gas turbine with numerical zooming method

Power Balance Strategies in Steady-State Simulation of the Micro Gas Turbine Engine by Component-Coupled 3D CFD Method

Multi-Fidelity Simulation of Gas Turbine Overall Performance by Directly Coupling High-Fidelity Models of Multiple Rotating Components

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