A three-dimensional incompressible flow simulation method and its application to the Space Shuttle main engine. II Turbulent flow

Chang, J. L. C.; Rosen, Robert; Dao, S. C.; Kwak, Dochan

doi:10.2514/6.1985-1670

Cited by 12 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A steady-state, turbulent flow solution for an HGM with two elliptical transfer ducts at Re= lo5 has been obtained. 35 In Figure 13 the swirling flow in the elliptical transfer duct is illustrated. In comparing these results with the laminar solution in Figure 12, it is seen that only a double-swirl pattern exists.…”

Section: Computed Resultsmentioning

confidence: 99%

Numerical simulation methods of incompressible flows and an application to the Space Shuttle main engine

Chang

Kwak

Rogers

et al. 1988

Numerical Methods in Fluids

Self Cite

View full text Add to dashboard Cite

This paper discusses incompressible Navier‐Stokes solution methods with an emphasis on the pseudocompressibility method. A steady‐state flow solver based on the pseudocompressibility approach is then described. This flow solver code has been used to analyse the internal flow in the Space Shuttle main engine hot‐gas manifold. Salient features associated with this three‐dimensional realistic flow simulation are discussed. Numerical solutions relevant to the current engine analysis and the redesign effort are discussed along with experimental results. This example demonstrates the potential of computational fluid dynamics as a design tool for aerospace applications.

show abstract

Section: Computed Resultsmentioning

confidence: 99%

Numerical simulation methods of incompressible flows and an application to the Space Shuttle main engine

Chang

Kwak

Rogers

et al. 1988

Numerical Methods in Fluids

Self Cite

View full text Add to dashboard Cite

show abstract

“…They used implicit finite difference techniques to simulate steady laminar flow inside an annular duct and over a cylinder. Their work was initiated to develop a computer code to analyze the complex flow field observed in the hot gas manifold of Space Shuttle Main Engine [4]. Their paper demonstrated the pivotal role played by compressibility factor in convergence of the numerical solution and also identifies the criteria for selecting the lower and the upper bounds of the same.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Laminar and Intermittently Turbulent Flow Over a Flat Plate Using Pseudo-Compressibility Model

Srivastava

Eastridge

Taravella

et al. 2019

ASME 2019 Verification and Validation Symposium

View full text Add to dashboard Cite

A study was conducted to investigate the characteristics of incompressible unsteady boundary layer flows (laminar and intermittently turbulent), numerically and experimentally. The main objective of the study is to validate and verify (V&V) the accuracy of the proposed pseudo-compressibility model in solving the incompressible Navier-Stokes (NS) equations. This approach will enable one to use a second order accurate (temporally and spatially) implicit finite-difference (FD) technique to solve NS equations (including RANS equations). Here, the proposed pseudo-compressibility model is used for laminar and intermittent turbulent flow simulations. Flow over a flat plate is chosen as the benchmark case for the validation of the proposed pseudo-compressibility model. An in-house code is developed to solve the boundary layer equations using an Alternating-Direction Explicit (ADE) FD technique. The boundary layer equations are discretized using explicit FD techniques which are second order accurate. The velocity field predicted by this code is compared to the one given by Blasius’ analytical solution. A second in-house code is also developed which adopts the proposed model of pseudo-compressibility to solve the incompressible NS equations. The two dimensional, unsteady conservation of mass and momentum equations are discretized using explicit finite-difference techniques. A standard K-ε closure model is used along with RANS equation to simulate turbulent flows. The primitive variables (velocity and pressure) predicted by this code are compared to the ones predicted by a commercial CFD package (Fluent). Once the method of pseudo-compressibility is validated, it is then implemented into another in-house computer code which employs implicit FD technique and Coupled Modified Strongly Implicit Procedure (CMSIP) to solve for the unknowns of the problem under study. The predictions based on the pseudo-compressibility model for laminar flow are validated using the results of the experiments in which Particle Image Velocimetry (PIV) technique was employed. The verification; that is, the numerical uncertainty estimation of the pseudo-compressible code was accomplished by using the Grid Convergence Index (GCI) method. The results of the present study indicate that the proposed pseudo-compressibility model is capable of predicting experimentally observed characteristics of the external flows successfully, and deviations between the predicted velocity magnitudes and experimentally measured velocities are within an acceptable range for laminar and intermittently turbulent flows conditions.

show abstract

“…Three-dimensional internal flows bounded by domains of large curvatures and geometric variations are commonly encountered in fluid machinery. Numerous attempts with varying degrees of complexities of physics and numerics have been made to predict the flow behavior in both rotating and nonrotating components, as documented in, e.g.,Refs [1][2][3][4][5][6][7][8]. In these studies, efforts are taken to accurately reproduce the geometric boundaries, both internal and external, of the whole domain in detail.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Computation of Flow in a Passage With 360° Turning and Multiple Airfoils

Shyy

Vu²

1991

Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery

View full text Add to dashboard Cite

Numerical modeling of the three-dimensional flows in a spiral casing of a hydraulic turbine, containing a passage of 360-degree turning and multiple elements of airfoils (the so-called distributor), is made. The physical model is based on a novel two-level approach, comprising of (1) a global model that adequately accounts for the geometry of the spiral casing but smears out the details of the distributor and represents the multiple airfoils by a porous medium treatment, and (2) a local model that performs detailed analysis of flow in the distributor region. The global analysis supplies the inlet flow condition for the individual cascade of distributor airfoils, while the distributor analysis yields the information needed for modeling the characteristics of the porous medium. Comparisons of pressure and velocity profiles between measurement and prediction have been made to assess the validity of the present approach. Flow characteristics in the spiral casing are also discussed.

show abstract

A three-dimensional incompressible flow simulation method and its application to the Space Shuttle main engine. II Turbulent flow

Cited by 12 publications

References 4 publications

Numerical simulation methods of incompressible flows and an application to the Space Shuttle main engine

Numerical simulation methods of incompressible flows and an application to the Space Shuttle main engine

A Numerical Study of Laminar and Intermittently Turbulent Flow Over a Flat Plate Using Pseudo-Compressibility Model

Modeling and Computation of Flow in a Passage With 360° Turning and Multiple Airfoils

Contact Info

Product

Resources

About