Component Performance

Kurzke, Joachim; Halliwell, Ian

doi:10.1007/978-3-319-75979-1_12

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Volumetric effects of components are considered. The residual test equations are established based on the common operating conditions, such as continuous flow, pressure balance, speed balance, and power balance, and solved numerically iteratively to achieve the whole engine performance simulation by constraining the specific common operating conditions [14][15][16][17][18]. The overall engine performance calculation model mainly includes four parts, which are the air gas property calculation module, component performance calculation module, engine aerodynamic and thermal calculation module, and engine co-working iteration calculation module.…”

Section: Normal Engine Overall Performance Simulation Modelmentioning

confidence: 99%

LPT rotor speed after low-pressure shaft failure

Meng,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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When designing engine safety and compliance with airworthiness regulations, it is important to determine the variation of rotor rotational speed and other parameters of aero-engine under shaft failure scenarios. In this paper, a transient process simulation model is established using the component method for a high bypass ratio two-shaft direct-drive turbofan engine. It helps analyze the response of engine rotor speed and key temperature parameters after the failure of the low-pressure shaft, the influence of the fuel supply, low-pressure turbine efficiency, and rotor resistance torque on the response of the parameters. The results demonstrate that the sudden increase of the low-pressure shaft speed at the turbine end after the failure of the low-pressure shaft is the most important factor affecting the engine safety design. The fuel supply, LPT efficiency, and resistance torque have significant effects on this sudden increase in speed.

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Section: Normal Engine Overall Performance Simulation Modelmentioning

confidence: 99%

LPT rotor speed after low-pressure shaft failure

Meng,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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“…The value of the gradient Grad E PW /X i is given as a constant in Case 4 and Case 5. And for other cases, the gradient is calculated using the Regual Falsi method [33]. It can be seen that a large internal CFD time step n CFD (e.g., Case 6) or a small relaxation factor λ (e.g., Case 3) will be helpful for the convergence of power residual iteration.…”

Section: Sliding Windowmentioning

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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“…Over the past 70 years, several transient simulation methodologies have been developed, including the constant mass flow (CMF) method [1], intercomponent volume method [2], pressure wave in volume method [3] and imbalanced mass flow method [4]. However, ongoing research on gas turbine transient performance prediction has revealed discrepancies between simulation and experimental results [5]. This has led to the identification of additional factors that affect engine transient operation, such as the heat soakage effect.…”

Section: Introductionmentioning

confidence: 99%

Quasi-2d Thermal Network Based Heat Soakage Model for Gas Turbine Transient Performance Modification

Yang,

Nikolaidis,

Pilidis

2023

Preprint

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Component Performance

Cited by 4 publications

References 25 publications

LPT rotor speed after low-pressure shaft failure

LPT rotor speed after low-pressure shaft failure

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

Quasi-2d Thermal Network Based Heat Soakage Model for Gas Turbine Transient Performance Modification

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