Simultaneous Prediction of External Flow-Field and Temperature in Internally Cooled 3-D Turbine Blade Material

Han, Zhen Xue; Dennis, Brian H.; Dulikravich, George S.

doi:10.1515/tjj.2001.18.1.47

Cited by 33 publications

(23 citation statements)

References 11 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method taking advantage of available single-filed solvers had then been promptly adopted by some investigations [2][3][4][5][6], most of which used mature parabolic or elliptic equation solvers based on finite element (FE) methods in the solid domain. Meanwhile, partially aiming at enhancing the stability of the algorithm, the direct or full conjugate strategy [7][8][9][10][11] that integrates the governing equations in both fluid and solid domains using a single code also began to be developed and applied.…”

Section: Introductionmentioning

confidence: 99%

The Application of Discontinuous Galerkin Methods in Conjugate Heat Transfer Simulations of Gas Turbines

Hao

Ren

2014

Energies

View full text Add to dashboard Cite

Abstract:The performance of modern heavy-duty gas turbines is greatly determined by the accurate numerical predictions of thermal loading on the hot-end components. The purpose of this paper is: (1) to present an approach applying a novel numerical technique-the discontinuous Galerkin (DG) method-to conjugate heat transfer (CHT) simulations, develop the engineering-oriented numerical platform, and validate the feasibility of the methodology and tool preliminarily; and (2) to utilize the constructed platform to investigate the aerothermodynamic features of a typical transonic turbine vane with convection cooling. Fluid dynamic and solid heat conductive equations are discretized into explicit DG formulations. A centroid-expanded Taylor basis is adopted for various types of elements. The Bassi-Rebay method is used in the computation of gradients. A coupled strategy based on a data exchange process via numerical flux on interface quadrature points is simply devised. Additionally, various turbulence Reynolds-Averaged-Navier-Stokes (RANS) models and the local-variable-based transition model γ-Reθ are assimilated into the integral framework, combining sophisticated modelling with the innovative algorithm. Numerical tests exhibit good consistency between computational and analytical or experimental results, demonstrating that the presented approach and tool can handle well general CHT simulations. Application and analysis in the turbine vane, focusing on features around where OPEN ACCESSEnergies 2014, 7 7858 there in cluster exist shock, separation and transition, illustrate the effects of Bradshaw's shear stress limitation and separation-induced-transition modelling. The general overestimation of heat transfer intensity behind shock is conjectured to be associated with compressibility effects on transition modeling. This work presents an unconventional formulation in CHT problems and achieves its engineering applications in gas turbines.

show abstract

Section: Introductionmentioning

confidence: 99%

The Application of Discontinuous Galerkin Methods in Conjugate Heat Transfer Simulations of Gas Turbines

Hao

Ren

2014

Energies

View full text Add to dashboard Cite

show abstract

“…Meanwhile, turbulence of the drainage device was lower. It could improve the characteristics of flow field by adding the grids, which was also mentioned in other literatures [16][17][18].…”

Section: Effects On Installation Of Gridsmentioning

confidence: 72%

Computational Flow Dynamic Simulation of Micro Flow Field Characteristics Drainage Device Used in the Process of Oil-Water Separation

Jin

Liu

2017

Geofluids

View full text Add to dashboard Cite

Aqueous crude oil often contains large amounts of produced water and heavy sediment, which seriously threats the safety of crude oil storage and transportation. Therefore, the proper design of crude oil tank drainage device is prerequisite for efficient purification of aqueous crude oil. In this work, the composition and physicochemical properties of crude oil samples were tested under the actual conditions encountered. Based on these data, an appropriate crude oil tank drainage device was developed using the principle of floating ball and multiphase flow. In addition, the flow field characteristics in the device were simulated and the contours and streamtraces of velocity magnitude at different nine moments were obtained. Meanwhile, the improvement of flow field characteristics after the addition of grids in crude oil tank drainage device was validated. These findings provide insights into the development of effective selection methods and serve as important references for oil-water separation process.

show abstract

“…One is by an extension of the CFD code in the solid region, where only the energy equation is solved [3,6,7]. The main advantage is that only one code is needed for the whole domain.…”

Section: Methodsmentioning

confidence: 99%

A comparison of conjugate heat transfer methods applied to an axial helium turbine

Verstraete

Alsalihi

Braembussche

2007

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

The current paper presents a numerical investigation of the conjugate heat transfer (CHT) in an axial helium turbine. The objective is the prediction of the cooling needed to keep the blade temperature below the allowable material limits. The cooling is applied at the hub by means of internal cooling channels.A CHT solver has been developed for this purpose. It combines a three-dimensional heat conduction calculation inside the blade with a three-dimensional Navier-Stokes flow calculation around the turbine blade. The required cooling at the blade root is calculated by imposing the temperature limit as boundary conditions at the bottom plane.Various alternative methods to implement the CHT are tested and compared. The results indicate that the so-called h-method is superior both in terms of accuracy and convergence speed.

show abstract

Simultaneous Prediction of External Flow-Field and Temperature in Internally Cooled 3-D Turbine Blade Material

Cited by 33 publications

References 11 publications

The Application of Discontinuous Galerkin Methods in Conjugate Heat Transfer Simulations of Gas Turbines

The Application of Discontinuous Galerkin Methods in Conjugate Heat Transfer Simulations of Gas Turbines

Computational Flow Dynamic Simulation of Micro Flow Field Characteristics Drainage Device Used in the Process of Oil-Water Separation

A comparison of conjugate heat transfer methods applied to an axial helium turbine

Contact Info

Product

Resources

About