Search
CSV
RISNumerical Study of Purge and Secondary Flows in a Low-Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The secondary flow increases the loss and changes the flow incidence in the downstream blade row. To prevent hot gases from entering disk cavities, purge flows are injected into the mainstream in a real aero-engine. The ...
Future Use of Large Eddy Simulation in Aeroâ€گengines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Computational fluid dynamics (CFD) has become a critical tool in the design of aeroengines. Increasing demand for higher efficiency, performance, and reduced emissions of noise and pollutants has focused attention on ...
Modular Turbulence Modeling Applied to an Engine Intake
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The one equation Spalart–Allmaras (SA) turbulence model in an extended modular form is presented. It is employed for the prediction of crosswind flow around the lip of a 90 deg sector of an intake with and without ...
Numerical Investigation of Contrasting Flow Physics in Different Zones of a High Lift Low Pressure Turbine Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Using a range of highfidelity large eddy simulations (LES), the contrasting flow physics on the suction surface, pressure surface, and endwalls of a lowpressure turbine (LPT) blade (T106A) was studied. The current paper ...
Differential Equation Specification of Integral Turbulence Length Scales
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A Hamilton–Jacobi differential equation is used to naturally and smoothly (via Dirichlet boundary conditions) set turbulence length scales in separated flow regions based on traditional expected length scales. Such zones ...
Numerical Investigation of Three-Dimensional Separation in an Axial Flow Compressor: The Influence of Freestream Turbulence Intensity and Endwall Boundary Layer State
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Regions of three-dimensional separations are an inherent flow feature of the suction surface-endwall corner in axial compressors. These corner separations can cause a significant total pressure loss and reduce the compressor's ...
RANS Modeling of Accelerating Boundary Layers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A numerical investigation of accelerated boundary layers (BL) has been performed using linear and nonlinear eddy viscosity models (EVM). The acceleration parameters (KS) investigated the range between 1.5 أ— 10−6 and ...
Inverse Design of 3D Multistage Transonic Fans at Dual Operating Points
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Semiinverse design is the automatic recambering of an aerofoil during a computational fluid dynamics (CFD) calculation in order to achieve a target lift distribution while maintaining thickness, hence, “semiinverse.†...
A Mixed-Fidelity Numerical Study for Fan–Distortion Interaction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Inlet distortion often occurs under off-design conditions when a flow separates within an intake and this unsteady phenomenon can seriously impact fan performance. Fan–distortion interaction is a highly unsteady aerodynamic ...
Effect of Inlet Distortion Features on Transonic Fan Rotor Stall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effect of inlet distortion from curved intake ducts on jet engine fan stability is an important consideration for next-generation passenger aircraft such as the boundary layer ingestion (BLI) “silent aircraft.” Highly ...