Feasibility of Hot-Block Anemometry.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 1988
- Accession Number
- ADA195275
Entities
People
- Brian E. Thompson