Improvements to a tightly coupled viscous–inviscid procedure for three-dimensional unsteady transonic flow

Berezin, Charles R.; Sankar, Lakshmi N.

doi:10.1016/s0045-7930(97)00051-0

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Combination Of Multiple Methods1

Low-and High-fidelity Simulation Framework1

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2013

2015

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Cited by 2 publications

(2 citation statements)

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“…In order to evaluate the performance of helicopter rotors, [29,30] developed a closely coupled potential flow and full Navier-Stokes modeling technique. When compared to a full Navier-Stokes model, this technique reduced the computational effort by 40-50% without reducing the accuracy.…”

Section: Combination Of Multiple Methodsmentioning

confidence: 99%

Coupled inviscid-viscous solution method for bounded domains: Application to data-center thermal management

Cruz

Joshi

2015

International Journal of Heat and Mass Transfer

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Section: Combination Of Multiple Methodsmentioning

confidence: 99%

Coupled inviscid-viscous solution method for bounded domains: Application to data-center thermal management

Cruz

Joshi

2015

International Journal of Heat and Mass Transfer

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“…Information in the rotor geometry spreadsheet is also used by GT-GRIDGEN to create a blade grid file normally used by GT-HYBRID (Refs. 17,18). This grid file, along with a motion file created using output from the RCAS analysis, is used to create the deformed geometry of the blade at a specified number of azimuthal locations using GT-HYBRID in a grid-check mode.…”

Section: Low-and High-fidelity Simulation Frameworkmentioning

confidence: 99%

Application of Low- and High-Fidelity Simulation Tools to Helicopter Rotor Blade Optimization

2013

J Am Helicopter Soc

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New helicopter rotor designs are desired that offer increased efficiency, reduced vibration, and reduced noise. Multidisciplinary optimization of rotors has been advanced by the development of "comprehensive" rotorcraft analysis tools; however, these tools lack built-in high-fidelity aerodynamic models. Accurate airload predictions utilize computational fluid dynamics (CFD) coupled to the computational structural dynamics (CSD) of a comprehensive code. These methods are too computationally intensive for numerous function calls as in optimization. Thus, an approach is needed where high-fidelity simulations can be routinely used in optimization. The process presented in this paper combines the results of a simplified aerodynamic low-fidelity simulation with a selected number of high-fidelity CFD/CSD simulations. The process is demonstrated for a four-bladed hingeless rotor. Design variables include tip geometry and spanwise twist. Approximation models are built for high-fidelity metrics for rotor efficiency and vibration. Optimization using these approximation models found a design having maximum rotor efficiency while constraining vibration.

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Improvements to a tightly coupled viscous–inviscid procedure for three-dimensional unsteady transonic flow

Cited by 2 publications

References 6 publications

Coupled inviscid-viscous solution method for bounded domains: Application to data-center thermal management

Coupled inviscid-viscous solution method for bounded domains: Application to data-center thermal management

Application of Low- and High-Fidelity Simulation Tools to Helicopter Rotor Blade Optimization

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