Accession Number : ADA322977

Title :   Kilo-Constant-Current Anemometer System for Surface Hot-Films in Water.

Descriptive Note : Technical rept. 1 Sep 94-31 Mar 97,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCE AN ENGINEERING

Personal Author(s) : Wetzel, Todd G. ; Simpson, Roger L. ; Fleming, Jonathan L.

PDF Url : ADA322977

Report Date : 17 FEB 1997

Pagination or Media Count : 78

Abstract : A system for measuring the 3-D separation topology as a large scale underwater submarine model is described. Magnitude-only hot-film sensors are powered by constant current anemometers. The system is designed to use over 1000 sensors. Minima in skin friction magnitude are used to indicate crossflow separation. The hardware and sensor installation is described along with the result of several tests at the David Taylor Research Center's Rotating Arm facility. Future improvements are discussed along with a detailed uncertainty analysis to guide future designs.

Descriptors :   *FLOW SEPARATION, *ANEMOMETERS, HEAT TRANSFER, WATER FLOW, HYDRODYNAMIC CHARACTERISTICS, PRESSURE TRANSDUCERS, SUBMARINE EQUIPMENT, COMPUTATIONAL FLUID DYNAMICS, PRESSURE MEASUREMENT, SHEAR STRESSES, DATA ACQUISITION, SUBMARINE HULLS, MULTISENSORS, SKIN FRICTION, CROSS FLOW, THREE DIMENSIONAL FLOW, SUBMARINE MODELS.

Subject Categories : Fluid Mechanics
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE