High Resolution Measurements Of The Spatial Correlations Of The Velocity Field In Turbulent Flows

W. Windeln; C. G. Stojanoff

doi:10.1117/12.941475

10 September 1987 High Resolution Measurements Of The Spatial Correlations Of The Velocity Field In Turbulent Flows

W. Windeln, C. G. Stojanoff

Proceedings Volume 0808, Inverse Problems in Optics; (1987) https://doi.org/10.1117/12.941475
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands

Abstract

The objective of this report is the presentation of the experience gained in the experimental determination of the spatial correlations in a turbulent velocity field by means of an especially designed Laser-Doppler (LDV) holographic optics. The determination of the spatial velocity correlations requires the generation of two closely spaced LDV measuring volumes at specified positions. In conventional LDV optics this spacing is limited by the size of the optical components. The holographic optical elements (HOE) used in this work facilitate the positioning of the measuring volume at a spacing of 200 micrometers or better. Basic design considerations, the manufacturing of the holographic optics and the data acquisition are discussed.

Citation Download Citation

W. Windeln and C. G. Stojanoff "High Resolution Measurements Of The Spatial Correlations Of The Velocity Field In Turbulent Flows", Proc. SPIE 0808, Inverse Problems in Optics, (10 September 1987); https://doi.org/10.1117/12.941475

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