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RISFuture 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 ...
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.†...
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 ...
Large Eddy Simulation of Boundary Layer Transition Mechanisms in a Gas-Turbine Compressor Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Large eddy simulation (LES) is used to explore the boundary layer transition mechanisms in two rectilinear compressor cascades. To reduce numerical dissipation, a novel locally adaptive smoothing (LAS) scheme is added to ...
Toward Future Installations: Mutual Interactions of Short Intakes With Modern High Bypass Fans
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: In this paper, we investigate the coupled interaction between a new short intake design with a modern fan in a high-bypass ratio civil engine, specifically under the off-design condition of high incidence. The interaction ...
Numerical Analysis of an Instrumented Turbine Blade Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The measurement accuracy of the temperature/pressure probe mounted at the leading edge of a turbine/compressor blade is crucial for estimating the fuel consumption of a turbo-fan engine. Apart from the measurement error ...