Low Mach Number Temperature Measurements Using Encapculated Liquid Crystals
Abstract
An experimental program was conducted to evaluate the use of encapsulated liquid crystals as a means of determining temperature profiles in regions of interfering flows on wind tunnel models at supersonic speeds. The tests were conducted on both plane surfaces and on an ogive cylinder model equipped with 3 dimensional shock generators at Mach numbers of 1.89 and 3.00 in the Trisonic Gasdynamic Facility of the Air Force Flight Dynamics Laboratory. Freestream Reynolds number were 1.0 and 3.0 million per foot. Results show that models coated with encapsulated liquid slurry and overcoated with a protective plastic film provided better temperature profiles than models equipped with paper substrated liquid crystals. Temperature profiles were easily discernible over the entire surface of the ogive cylinder nodal within viewing range of the camera, and specular reflections on the non-planer surfaces did not invalidate any data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1973
- Accession Number
- ADA377156
Entities
People
- Max E. Hillsamer
Organizations
- Flight Dynamics Laboratory