Accession Number : ADA297733

Title :   Pressure Sensitive Paint Measurement on a Rotor.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Varner, Donald R.

PDF Url : ADA297733

Report Date : MAR 1995

Pagination or Media Count : 66

Abstract : Toward the development of a measurement system for transonic compressor rotors, the static pressure field over a high-speed test rotor was recorded using pressure sensitive paint (PSP) and an electronically-gated, intensified CCD video camera and frame-grabber. Semi-conductor digital logic circuits were developed to form a phase-locked image capture system which acquired ultra-high-speed, low-light-level gated images once per revolution (1/Rev). A monostable pulse circuit was developed to sum more than 200 gated images over a one-second integration period to build a single image. Rotor speed was measured on an oscilloscope using the 1/Rev trigger-pulse. Also, a pressure vessel was constructed and used to calibrate the PSP over varying pressure and temperature ranges to yield qualitative image intensity versus pressure data. Finally, the static pressure field data over the rotor surface was measured and presented as a 256 grey-scale and color image. jg p.3

Descriptors :   *COMPUTATIONAL FLUID DYNAMICS, *SENSITIVITY, *PRESSURE, *STATIC PRESSURE, *ROTOR BLADES, TEST AND EVALUATION, VELOCITY, DIGITAL SYSTEMS, ELECTRONICS, MEASUREMENT, TEMPERATURE, INTENSITY, THESES, GATES(CIRCUITS), SEMICONDUCTORS, AERONAUTICS, PULSES, COLORS, IMAGES, PRESSURE VESSELS, LOGIC CIRCUITS, PAINTS, VIDEO SIGNALS, TRANSONIC FLOW, PHASE LOCKED SYSTEMS, TRIGGER CIRCUITS, CHARGE COUPLED DEVICES, VIDEO FRAMES, HIGH SPEED CAMERAS, OSCILLOSCOPES.

Subject Categories : Aerodynamics
      Electrical and Electronic Equipment
      Hydraulic and Pneumatic Equipment
      Fluid Mechanics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE