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4 edition of Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence found in the catalog.

Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence

# Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence

Edition Notes

The Physical Object ID Numbers Statement Ye Zhou, Robert Rubinstein. Series ICASE report -- no. 95-77., NASA contractor report -- 198235., NASA contractor report -- NASA CR-16270. Contributions Rubinstein, Robert., Institute for Computer Applications in Science and Engineering. Format Microform Pagination 1 v. Open Library OL17139237M OCLC/WorldCa 35569067

Geomorphology 2. Stream Turbulence – 1. Name 32 Points. 2. The Reynolds Number: A Measure of Stream Turbulence. The Reynolds number assesses the degree of turbulence in stream flow. Non-turbulent flow, also called. laminar flow, has water molecules moving along parallel paths in a downstream direction at a constant velocity. T. urbulent flowFile Size: KB. for the high-turbulence wind tunnel was the same as Ref. 3, ex-cept that a perforated disk was centered on the duct axis near its downstream end, yielding a slowly decaying turbulence field so that sphere wakes could be observed at turbulence intensities of and %, with mean and fluctuating ambient velocities varying less than.

pressure-tapped, flat airfoils were testing at a Reynolds number of under a range of turbulence characteristics. Turbulence intensity was varied from to % and the longitudinal integral length scale was varied from to m. The overall trend when the intensity was increased was to. Turbulent Sounds. Here are the sounds that have been tagged with Turbulent free from Please bookmark us Ctrl+D and come back soon for updates! .

Title: The structure of isotropic turbulence at very high Reynolds numbers: Authors: Kraichnan, R. H. Publication: Journal of Fluid Mechanics, vol. 5, p   We investigated the turbulent intensities and Reynolds shear stress at high Reynolds number $$({Re_\\tau = 5 \\times 10^{6}})$$ (R e τ = 5 × 10 6) in the atmosphere surface layer (ASL) through analyzing observations in near-neutral stratified conditions. The results show that with increasing Reynolds number the streamwise turbulent intensity increases linearly, and the peak of the Reynolds Cited by: 2.

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### Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence Download PDF EPUB FB2

Get this from a library. Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence. [Yeh Chou; Robert Rubinstein; Institute for. Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence Physics of Fluids 8, ( “ On the Lighthill relationship and sound generation from isotropic turbulence,” Theor.

Comput. Fluid Dyn. 7, ().Cited by: Results reveal that the rates of the mean flow decay and spread vary with Reynolds number for Re d Cited by: TY - JOUR. T1 - Time correlations and random sweeping in isotropic turbulence. AU - Nelkin, Mark. AU - Tabor, M. PY - /1/1.

Y1 - /1/1. N2 - The Lagrangian and Eulerian frequency spectrum in isotropic turbulence is considered without a mean flow, concentrating on its second moment, the mean-square by: The question of how wall turbulence changes at high Reynolds numbers has received heightened interest over the last decade or so.

This has resulted in the construction or planning of high Reynolds number facilities, including the Princeton Superpipe (Zagarola and Smits, ), the development of SLTEST, an atmospheric test facility in the Great Salt Lake Desert, Utah (Klewicki et al., Cited by: The frequency spectrum of the sound radiated by isotropic turbulence is found to scale as ω−4/3 at high frequencies.

Dimensional analysis based on Kolmogorov scaling predicts the dependence ω. High Reynolds Number and Turbulence Effects on Aerodynamics and Heat Transfer in a Turbine Cascade Frederick C. Yeh, Steven A. Hippensteele, G. James Van Fossen, Philip E.

Poinsatte, and Ali Ameri Lewis Research Center Cleveland, Ohio Prepared for the 29th Joint Propulsion Conference and Exhibit cosponsored by the AIA.A, SAE, ASME, and ASEEFile Size: 7MB.

The work was performed in two unique facilities: the Superpipe and the High Reynolds number Test Facility (HRTF) that can obtain very high Reynolds numbers on a laboratory scale using compressed Author: Alexander J Smits.

direct-interaction approximation) to stationary isotropic turbulence of very high Reynolds number. The characteristic wave-number k, = E/W; and Reynolds number R, = v,k;l/v, where vo is the r.m.s. velocity in any given direction, t. is the power dissipated per unit mass, and v is the kinematic viscosity, are intro- File Size: KB.

Y. ZHOU, R. RUBINSTEINSweeping and straining effects in sound generation by high Reynolds number isotropic turbulence Physics of Fluids, 8 (), p.

Google ScholarCited by: 7. SOUND GENERATION BY TURBULENCE AND SURFACES IN ARBITFRARY MOTION BY J. FFOWCS WILLIAMS AND D. HAWKINGSt Department of Mathematics, Imperial College, London (Communicated by M.

Lighthill, Sec.R.S.-Received 26 July ) CONTENTS PAGE 1. INTRODUCTION 2. DERIVATION OF THE GOVERNING EQUATIONS 3. The structure of isotropic turbulence at very high Reynolds numbers Item Preview remove-circle Share or Embed This Item.

Call number Camera Canon 5D Foldoutcount 0 Identifier structureofisotr00krai Identifier-ark ark://tz Lcamid Missingpages Openlibrary_editionPages: Zhou Y, Rubinstein R. Sweeping and straining effects in sound generation by high Reynolds number isotropic turbulence.

Phys. Fluids, ; – CrossRef ADS zbMATH Google ScholarAuthor: X. Zhao, G. Around a Circular Cylinder at Subcritical Reynolds Numbers Willy 2. Sadeh and Daniel B. Saharon GRANT NSG-3 12 7 on the flow around a smooth circular cylinder at subcritical Reynolds numbers from ~10~ to x was conducted.

particular Reynolds number-background turbulence combina- tion. These results demonstrate that a boundary. In fluid dynamics, turbulence or turbulent flow is a flow regime characterized by chaotic, stochastic property changes.

This includes low momentum diffusion, high momentum convection, and rapid. Subjected to High Free-stream Turbulence Effects Edgar Orsi Filho Abstract The work presented in this thesis was on nominally two-dimensional turbulent boundary layers at zero pressure gradient subjected to high free-stream turbulent intensities of up to % in preparations for high free-stream turbulence studies on three-dimensional.

Full text of "The structure of isotropic turbulence at very high Reynolds numbers" See other formats ^W YORK UNlVtR'iliW iN§TlTUTI OF f: ATHEMATICAI E^ AFCRC-TN., ^„^ ASTIA DOCUMENT No.

AD U V^WWiV M"^»^ Y*^ >/ ^ 1^ A^. ^^ ^V NEW YORK UNIVERSITY to S^ I ^ lY ^ Institute of Mathematical Sciences m Division of Electromagnetic Research RESEARCH REPORT No. MH-9. maintains excellent isotropic turbulence properties further downstream. Wu et al. () used a similar random permutation of 50 independent fully developed turbulent pipe ﬂow realizations as inﬂow to promote spatially developing pipe transition to turbulence.

When two or more inde-File Size: 2MB. Depends what you want to understand it for. Turbulence is an extremely complex phenomenon for which there is no clear mathematical or physical explanation to this date, and remains as one of the biggest problems in physics.

For this reason, there. rebirth of low Reynolds number interest, this work currently aims to investigate the effect of free stream turbulence on separation at different settings of angle of attack, stagger, and Reynolds number.

Background and Previous Research The current research drew from many aspects and practices of aerodynamic testing that have. Hello, I have a question regarding Reynolds numbers. As I understand, the higher a Reynolds number, the more turbulent a flow becomes, with Re> considered turbulent.

I have a model where I've calculated a Reynolds number of 10^7. Space-time correlation is a staple method for investigating the dynamic coupling of spatial and temporal scales of motion in turbulent flows. In this article, we review the space-time correlation models in both the Eulerian and Lagrangian frames of reference, which include the random sweeping and local straining models for isotropic and homogeneous turbulence, Taylor's frozen-flow model and Cited by: Turbulence (Shu, Ch.

9) We’ll focus on incompressible fow – For an isotropic, homogeneous fuid, we look at the cascade of energy from the moton of eddies at the largest scale down to the dissipaton scale For compressible fows, the variatons in density will lead to pressure fuctuatons, and generate sound Size: 2MB.