Accession Number : ADA195275
Title : Feasibility of Hot-Block Anemometry.
Descriptive Note : Final rept. 1 Jul 87-31 Jan 88,
Corporate Author : SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT
Personal Author(s) : Thompson, Brian E
PDF Url : ADA195275
Report Date : 29 Feb 1988
Pagination or Media Count : 40
Abstract : Measurements of the instantaneous velocity vector are wanted in turbulent flows to determine the three components of mean velocity, the six components of the Reynolds stress tensor, and any higher order components required. It is desirable to obtain these velocity characteristics non-obtrusively, but a combination of the difficulty, complexity, cost and need for optical access and seeding, lead to hot-block anemometry as a complementary approach with different uncertainties and applications. The feasibility of developing hot-block anemometry to measure three-dimensional laminar and turbulent flows was investigated. The design of hot-block probes was addressed and the criteria for the measurement of turbulent flow, which include probe dimensions, power dissipation, probe materials, and sensor configurations, were obtained. Heat-transfer analysis, based partly on combined convection and conduction calculations of two-dimensional geometries, suggest that a three-dimensional probe concept based on hot-film pads is the configuration most likely to meet frequency response requirements for turbulent flows. Keywords: Anemometry, Velocimetry, Hot block, Hot film, Directionally sensitive, Thermal, Flow, Measurement.
Descriptors : *HEAT TRANSFER, *TURBULENT FLOW, *ANEMOMETERS, ACCESS, CONDUCTIVITY, CONFIGURATIONS, CONVECTION, COSTS, DETECTORS, DISSIPATION, FILMS, FREQUENCY RESPONSE, HIGH TEMPERATURE, MATERIALS, MEAN, MEASUREMENT, MOMENTUM TRANSFER, OPTICAL PROPERTIES, POWER, PROBES, REQUIREMENTS, STRESSES, TENSORS, THREE DIMENSIONAL, TWO DIMENSIONAL, VELOCITY, SHEAR STRESSES, THREE DIMENSIONAL FLOW
Subject Categories : Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE