ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
This paper describes the usefulness, limitations, and potential applications of spark velocimetry to complex flows in fluid machinery. Spark velocimetry uses high-voltage high-frequency sparks to successively illuminate a column of air particles and thus map out a complex velocity field. This work applied spark velocimetry to a two-dimensional boundary layer, a three-dimensional horseshoe vortex boundary layer, and boundary layers on the suction surface of a rotor blade in steady flow and in rotating stall. Measurements made in a two-dimensional boundary layer compared favorably with measurements taken using a total pressure probe. The measurements in the horseshoe vortex showed the types of primary and secondary flow expected. The velocity profile of the boundary layer on a rotor blade was shown in both unstalled and stalled flow. The spark velocimetry method was shown to be a very useful measurement tool for three-dimensional and unsteady flows with some limitations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1139252
