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Showing 1 to 19 of 19 for “"Shear Stress Transport (SST)"”.
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Development of a Graphical User Interface Presenting Turbulent Airflow Over A Flight-Deck For Improved Situational Awareness For Helicopter Pilots in Challenging Wind Conditions
… (3D) design was selected for development of a Shear-Stress Transport (SST) turbulence model using the Simplifed Frigate Shape 2 (SFSll) geometry. The 3D model was created for further testing in a simulator.The findings show interest exists within the helicopter pilot community for a capability …
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Computational analysis of multielement airfoils for wind turbines
… obtained using the four-equation Langtry-Menter Shear Stress Transport (SST) Transition turbulence model. Lift and drag coefficients were computed in an attempt to understand the effect of gap, overhang, and flap deflection on the multielement airfoil system performance. Wake bursting, a …
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Computational analysis of plasma actuation for control of shock-laden flows in scramjet isolators
… (RANS) equations coupled with Menter’s Shear Stress Transport (SST) turbulence model were used to simulate the flow physics, and the plasma actuators were modeled as a volumetric internal energy source term to represent the Joule heating effect of Q-DC discharges. The volume of energy …
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Assessment of RANS Turbulence Models for Hypersonic Flat Plates
… study evaluates the performance of the Menter Shear Stress Transport (SST) and Spalart–Allmaras (SA) models on a group of hypersonic flat plate cases from a recent direct numerical simulation (DNS) database. Quantities of interest examined include velocity, temperature, turbulent kinetic …
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Investigation of film cooling effectiveness from cylindrical cooling hole with anti vortex generator by numerical simulation
… experimental data. The steady turbulence model shear stress transport (SST) that was used to simulate a film cooling configuration. The results have been presented in terms of laterally averaged film cooling comparison graphs, velocity field on x/d = 3.0, non-dimensional temperature on x/d = 3.0 …
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Numerical Simulation of Flows past a Circular and a Square Cylinder at High Reynolds Number, and a Curved Plate in Transitional Flow
… from WA model, Spalart-Allmaras (SA) model, the shear stress transport SST k-w model and the standard Wilcox k-w model. For circular cylinder, the computations are performed for Reynolds numbers and and simulation for a square cylinder is performed at a Reynolds number <em>.</em>The computed …
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Experimental and simulation study on the effect of geometrical and flow parameters for combined-hole film cooling
… Fluid Dynamic (CFD) with application of Shear Stress Transport (SST) turbulence model analysis from ANSYS CFX. Meanwhile, the experimental approach makes used of open end wind tunnel and the temperature distributions were measured by using infrared thermography camera. The purpose of the …
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Wake deceleration of a racecar multielement airfoil in ground effect
… results were obtained using a two equation shear stress transport (SST) k–omega model coupled with a one equation intermittency transition model to predict the laminar-to-turbulent boundary layer transition. The simulations were performed for an inverted two-element airfoil consisting of a …
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Experimental and simulation study on the aerodynamic performance of a counter rotating vertical axis wind turbine
… fluid dynamics (CFD) models based on K-omega shear stress transport (SST) model. The computational work covers a wider range of simulation processes compared to the experiment which includes a parametric study based on the axial distance between the two rotors and blade height. The performance …
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Initial Investigations into the Failure Modes of a Swirl Distortion Generator Using Computational Methods
… averaged Navier-Stokes equations (URANS) and shear stress transport (SST) turbulence model. In turn, the shedding frequencies for each parameter were recorded, and more intuition was gained on the TE flow field in correspondence to different airfoil specifications. Overall, the two sets of …
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Numerical Investigation using RANS Equations of Two-dimensional Turbulent Jets and Bubbly Mixing layers
… data. The models tested include 𝘬—𝜖, shear-stress transport (SST), and Reynolds stress transport (SSG) models. All tested turbulence models under predict the spreading rate of the bubbly mixing layer, even though they accurately predict the spreading rate for single phase flow. The …
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Computational Studies of Penetration and Mixing for Complex Jet Injectors to Aid in Design of Hypersonic Systems
… flow solver employed was GASP v. 4.2. The Menter Shear Stress Transport (SST) turbulence model was used, since the algorithm has good capability of solving both wall-bounded and free-shear flows. The SST model was able to capture the mixing behavior of the complex flow-field. Important numerical …
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Optimization Under Uncertainty and Total Predictive Uncertainty for a Tractor-Trailer Base-Drag Reduction Device
… (S-A), S-A with rotation and curvature, Menter shear-stress transport (SST), and Wilcox 1998 k-ω. Model performance is evaluated for three low subsonic 2-D applications: turbulent flat plate, planar jet, and NACA 0012 airfoil at α = 0°. The S-A turbulence model is selected for the 2-D OUU study. …
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Turbulence Modelling for Complex Flows in Turbomachinery
… (namely Spalart-Allmaras (SA) and Menter’s Shear Stress Transport (SST) models) have been found to overpredict the size of corner separation. The physical reason is partly attributed to the underestimation of turbulence mixing between the main flow and the endwall boundary layer. This makes …
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Numerical investigation of slat noise attenuation using acoustic liners
… an URANS calculation with the two-equation shear stress transport (SST) κ - ω model to model the effect of turbulence and a region in the slat cove is set as laminar zone. In the SNGR approach broadband sources of noise are modeled using stochastic noise generation method from a numerical …
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Computational fluid dynamics and experimental study of the hydrodynamics of a bubble column and an air-water jet-stirred cell
… Two different multiphase turbulence models, Shear Stress Transport (SST) and Large Eddy Simulation (LES), were tested, and different interfacial closure models reported in the literature were examined. When LES were used to model the turbulence instead of the SST model, much better agreement …
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IMPACT OF NEW CHEVRON CONFIGURATIONS ON MIXING ENHANCEMENT IN SUBSONIC JETS
… of the chevron nozzles is modeled. Since the Shear Stress Transport (SST) k-ω turbulence model has been widely used in several aerospace applications, it is chosen for all simulations here as well. The numerical analysis shows that STAR-CCM+ can successfully be used for the study of jet flows. …
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Optimization of Wind Turbine Airfoils/Blades and Wind Farm Layouts
… equations in conjunction with a two-equation Shear Stress Transport (SST) turbulence model and a three equation k-kl-ω turbulence model. The optimization methodology is validated by an optimization study of subsonic and transonic airfoils (NACA0012 and RAE 2822 airfoils). All the …
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Time-domain and harmonic balance turbulent Navier-Stokes analysis of wind turbine aerodynamics using a fully coupled low-speed preconditioned multigrid solver
… RANS equations coupled to the two-equation shear stress transport (SST) turbulence model. The design of the LSP implementation is such that each part of the code affected by LSP can be validated individually against the baseline solver by suitably specifying one numerical input parameter of …