Evaluation of Computational Fluid Dynamics and Coupled Fluid-Solid Modeling for a Direct Transfer Preswirl System

Javiya, Umesh; Chew, John W.; Hills, Nicholas J.; Dullenkopf, Klaus; Scanlon, Timothy

doi:10.1115/1.4007752

Cited by 11 publications

(8 citation statements)

References 30 publications

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“…However, mesh density in all domains was consistent with previous experience and CFD evaluations against experimental data, as shown, for example, by Javiya et al. 10,16 Near-wall mesh y+ values for maximum power conditions are shown in Figure 4 for 3D solutions. These were in the accepted range (30–150) over most of the coupled walls in all three initial CFD models of all five cavities.…”

Section: Cfd Modelssupporting

confidence: 88%

“…Several researchers have demonstrated FE–CFD coupled analysis capability for heat transfer calculations in gas turbines. 4–12 Detailed validation of the coupled analysis approach was demonstrated by Javiya et al. 10 for a research test rig incorporating a model turbine disk with a pre-swirled cooling air delivery system.…”

Section: Introductionmentioning

confidence: 99%

“…IMechE) ~3~ et al [10] for a research test rig incorporating a model turbine disk with a pre-swirled cooling air delivery system. All these analyses used a single CFD domain with traditional convective boundary conditions applied on remaining boundaries of the FE model.…”

mentioning

confidence: 99%

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Coupled FE–CFD thermal analysis for a cooled turbine disk

Javiya

Chew

Hills

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents transient aero-thermal analysis for a gas turbine disk and the surrounding air flows through a transient slam acceleration/deceleration "square cycle" engine test, and compares predictions with engine measurements. The transient solid-fluid interaction calculations were performed with an innovative coupled finite element (FE) and computational fluid dynamics (CFD) approach. The computer model includes an aero-engine high pressure turbine (HPT) disk, adjacent structure, and the surrounding internal air system cavities. The model was validated through comparison with the engine temperature measurements and is also compared with industry standard standalone FE modelling. Numerical calculations using a 2D FE model with axisymmetric and 3D CFD solutions are presented and compared. Strong coupling between CFD solutions for different air system cavities and the FE solid model led to some numerical difficulties. These were addressed through improvement to the coupling algorithm. Overall performance of the coupled approach is very encouraging giving temperature predictions as good as a traditional model that had been calibrated against engine measurements.

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Section: Cfd Modelssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Coupled FE–CFD thermal analysis for a cooled turbine disk

Javiya

Chew

Hills

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Second, from standalone CFD solution with uniform disk temperature and the adiabatic wall temperature is calculated by the following equation employed in Ref. [29].…”

Section: Two Approaches For Calculating Htcmentioning

confidence: 99%

Numerical investigation of the pre-swirl rotor–stator system of the first stage in gas turbine

Liao

Wang

2014

Applied Thermal Engineering

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“…12 Illingworth et al., 13 and Javiya et al. 14 carried out coupled fluid-solid modeling for heat transfer in direct-transfer pre-swirl system.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics analysis for effect of length to diameter ratio of nozzles on performance of pre-swirl systems

Zhang

Wang

Liao

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part A:

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In a direct-transfer pre-swirl system, cooling air expands through stationary pre-swirl nozzles and flows through the cavity to the receiver holes located in the rotating turbine disc for blade cooling. This paper investigates the effect of the length-to-diameter ratios of pre-swirl nozzles on the performance of a direct-transfer pre-swirl system in a rotor-stator cavity. The commercial code CFX 12.1 is used to solve the Reynolds-averaged Navier-Stokes equations using the SST turbulence model. Computations are performed for seven length-to-diameter ratios, L/D ¼ 1, 2, 3, 4, 5, 6, and 7, a range of pre-swirl ratios, 0.5 < b p <2.0, and varying turbulent flow parameters, 0.12 < k T < 0.36. The rotational Reynolds number for each case is 10 6 . The computational fluid dynamics model presented in this paper is validated with the experimental results available in the literature. The nozzle exit flow angle decreases as length-to-diameter ratio L/D increases for L/D < 1/tan ( is pre-swirl nozzle angle). When L/D > 1/tan , is approximately invariant and below . The discharge coefficient C d,b for the receiver holes reaches a peak as the fluid in the rotating core is in synchronous rotation with the receiver holes. For small turbulent flow parameters k T , a peak of C d,b can be observed as L/D ¼ 3. For large turbulent flow parameters k T , the shift of the position for a peak occurs. When L/D ¼ 3, the synchronous rotation can be achieved with the smallest value for turbulent flow parameters k T . The adiabatic effectiveness of the system increases with turbulent flow parameters k T . A peak of Â b,ad is seen as L/D ¼ 3 for each case. When L/D < 1/tan , there is a significant increase in Â b,ad , especially for L/D < 2, with an increase in L/D. When L/D is increased further, a slight decrease occurs. Both performance parameters show that the optimum value for all cases can be achieved as L/D ¼ 3, which is slightly above 1/tan .

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Evaluation of Computational Fluid Dynamics and Coupled Fluid-Solid Modeling for a Direct Transfer Preswirl System

Cited by 11 publications

References 30 publications

Coupled FE–CFD thermal analysis for a cooled turbine disk

Coupled FE–CFD thermal analysis for a cooled turbine disk

Numerical investigation of the pre-swirl rotor–stator system of the first stage in gas turbine

Computational fluid dynamics analysis for effect of length to diameter ratio of nozzles on performance of pre-swirl systems

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