Inscrição na biblioteca: Guest
Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Improved k-ω-γ transition model considering distributed surface roughness

DOI: 10.1615/THMT-18.500
pages 507-518

M.C. Yang
School of aerospace engineering, Tsinghua University, Beijing, 100084, PR China

Zhixiang Xiao
School of Aerospace Engineering, Tsinghua University, Yifu building, Tsinghua University, 100084 Beijing, China

Resumo

The original k-ω-γ transition model has been extended to take into account the effects of distributed surface roughness. Inspired by the work of Dassler et al., a transport equation for "roughness amplification" factor Ar, which depends on equivalent sand grain roughness height ks, has been introduced into the original model. According to the results of linear stability theory, the effective length scale of original k-ω-γ model is amplified through Ar, which could lead to enhanced 1st mode time scale and hence earlier transition. This method is strictly based on local variables as well as a solid physical foundation. Several cases including flat plates and wind turbine airfoils have been investigated and satisfactory results have been achieved.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH