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RISEfficient Passage-Spectral Method For Unsteady Flows Under Stall Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an efficient method of approximating unsteady flows using a block-wise discrete spatial Fourier series for the modeling of three-dimensional non-axisymmetric flows without making any hypothesis about ...
Validation of Broadband Noise Prediction Methodology Based on Linearized Navier–Stokes Analyses
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This article presents an integral validation of a synthetic turbulence broadband noise prediction methodology for fan/outlet-guide-vane (OGV) interaction. The test vehicle is the ACAT1 fan, a modern scaled-down fan, ...
Asymptotic Description of Maximum Mistuning Amplification of Bladed Disk Forced Response
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The problem of determining the maximum forced response vibration amplification that can be produced just by the addition of a small mistuning to a perfectly cyclical bladed disk still remains ...
Profiled End Wall Design Using an Adjoint Navier–Stokes Solver
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A methodology to minimize blade secondary losses by modifying turbine end walls is presented. The optimization is addressed using a gradient-based method, where the computation of the gradient ...
The Low Reduced Frequency Limit of Vibrating Airfoils—Part II: Numerical Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper studies the unsteady aerodynamics of vibrating airfoils in the low reduced frequency regime with special emphasis on its impact on the scaling of the workpercycle curves by means of numerical experiments. ...
A Novel Mixing Plane Method Using Nonreflecting Boundary Conditions for Multirow Analysis in Turbomachines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new formulation of the mixing plane boundary condition to analyze the steadystate interaction between adjacent rows of a turbomachine, used in conjunction with steady twodimensional nonreflecting boundary conditions, is ...
Quantification of the Influence of Unsteady Aerodynamic Loading on the Damping Characteristics of Airfoils Oscillating at Low Reduced Frequency—Part II: Numerical Verification
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper numerically investigates the correlation between the so-called unsteady loading parameter (ULP), derived in Part I of the corresponding paper, and the unsteady aerodynamics of oscillating airfoils at low reduced ...
Quantification of the Influence of Unsteady Aerodynamic Loading on the Damping Characteristics of Airfoils Oscillating at Low-Reduced Frequency—Part I: Theoretical Support
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effect of the unsteady aerodynamic loading of oscillating airfoils in the low-reduced frequency regime on the work per cycle curves is investigated. The theoretical analysis is based on a perturbation analysis of the ...
Effect of Uneven Wall Heating Conditions Under Different Buoyancy Numbers for a One Side Rib-Roughened Rotating Channel
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the impacts of uneven wall heating conditions under different buoyancy numbers on flow field and heat transfer performance of a rotating channel with one side smooth and one side roughened by 45 deg ...
A Numerical Investigation on the Influence of Lateral Boundaries in Linear Vibrating Cascades
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effect of the finite extent of linear cascades on the unsteady pressure distribution of vibrating blades is assessed by means of a numerical study. The span of a reference cascade made ...