CaltechAUTHORS
  A Caltech Library Service

Flying-hot-wire study of two-dimensional mean flow past an NACA 4412 airfoil at maximum lift

Coles, Donald and Wadcock, Alan J. (1978) Flying-hot-wire study of two-dimensional mean flow past an NACA 4412 airfoil at maximum lift. In: 11th Fluid and PlasmaDynamics Conference, 10-12 July 1978, Seattle, WA. https://resolver.caltech.edu/CaltechAUTHORS:20141203-141933112

[img]
Preview
PDF - Published Version
See Usage Policy.

805Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20141203-141933112

Abstract

Hot-wire measurements have been made in the boundary layer, the separated region, and the near wake for flow past an NACA 4412 airfoil at maximum lift. The Reynolds number based on chord was about 1,500, 000. Special care was taken to achieve a two-dimensional mean flow. The main instrumentation was a flying hot wire; that is, a hot-wire probe mounted on the end of a rotating arm. The probe velocity was sufficiently high to avoid the usual rectification problem by keeping the relative flow direction always within a range of ±30 degrees to the probe axis. A digital computer was used to control synchronized sampling of hot-wire data at closely spaced points along the probe arc. Ensembles of data were obtained at several thousand locations in the flow field. The data include intermittency, two components of mean velocity, and twelve mean values for double, triple, and quadruple products of two velocity fluctuations. No information was obtained about the third (spanwise) velocity component. An unexpected effect of rotor interference was identified and brought under control. The data are available on punched cards in raw form and also after use of smoothing and interpolation routines to obtain values on a fine rectangular grid aligned with the airfoil chord. The data are displayed in the paper as contour plots.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.2514/6.1978-1196DOIArticle
http://arc.aiaa.org/doi/abs/10.2514/6.1978-1196PublisherArticle
Additional Information:© 1978 AIAA. Research supported by the Large-scale Aerodynamics Branch, NASA Ames Research Center under grants NGL 05-002-229 and NSG-2319.
Funders:
Funding AgencyGrant Number
NASANGL 05-002-229
NASANSG-2319
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper78-1196
Record Number:CaltechAUTHORS:20141203-141933112
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141203-141933112
Official Citation:Flying-hot-wire study of two-dimensional mean flow past an NACA 4412 airfoil at maximum lift D. COLES, A. WADCOCK 11th Fluid and PlasmaDynamics Conference, 1978, 10.2514/6.1978-1196
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52350
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:03 Dec 2014 22:39
Last Modified:03 Oct 2019 07:41

Repository Staff Only: item control page