Accession Number : ADA330728

Title :   Optical Propagation Through a Turbulent Jet.

Descriptive Note : Final Technical rept. 1 Mar 94-28 Feb 97

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Truman, C. R.

PDF Url : ADA330728

Report Date : SEP 1997

Pagination or Media Count : 7

Abstract : A fast optical tomography system has been used to investigate a heated round jet acoustically excited in axisymmetric and helical modes. This flow diagnostics reveals the development and interaction of large-scale vortices in the near-field region of the jet. In a complementary experimental study of prediction-based adaptive optics, Linear Stochastic Estimation of optical beam deflection produced by the jet has been used in an open-loop control system. a piezoelectric steering mirror wa controlled to minimize beam deflection based on temperature inputs. The results indicate that a multi-aperture adaptive- optic control system may be based on multi-point temperature measurements.

Descriptors :   *OPTICAL EQUIPMENT, *TURBULENT FLOW, *PIEZOELECTRIC MATERIALS, MIRRORS, OPTICS, STEERING, CONTROL SYSTEMS, INTERACTIONS, DEFLECTION, TURBULENCE, VORTICES, REGIONS, LIGHT TRANSMISSION, AXISYMMETRIC, DIAGNOSIS(GENERAL), TOMOGRAPHY, OPEN LOOP SYSTEMS, BEAMS(RADIATION), NEAR FIELD, HELIXES.

Subject Categories : Electricity and Magnetism
      Optics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE