FIELD-DEPLOYABLE MID-INFRARED TDLAS SENSOR FOR NASA EAST
Abstract
The acquisition of laser, detector, optical, mechanical, and electronic hardware is proposed to support the development and application of sensor strategies for the time-resolved measurement of species concentrations, state populations, and non-equilibrium gas temperatures within the NASA Ames Electric Arc Shock Tube (EAST) facility using tunable diode laser absorption spectroscopy (TDLAS). These measurements would provide complementary data to existing emission spectroscopy instrumentation presently in use at EAST and would serve to validate kinetic and radiation models applicable to hypersonic flight. TDLAS sensing can enable quantitative, high-bandwidth, non-invasive measurements of species, temperature, and velocity in high-speed flow environments. Strategies pioneered at Stanford are poised to address two critical measurement needs for the nation’s high-enthalpy test facilities- 1. Characterization of high-enthalpy facility freestream composition and transients 2. Quantitative measurement of chemical-thermal non-equilibrium to study its relationship to critical aerodynamic parameters Through collaboration with research partners at world-class ground test facilities, such as EAST, these capabilities could enhance both the utility of these vital ground test assets and our fundamental understanding of complex hypersonic phenomena.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110311
Entities
People
- Ronald Kent Hanson
Organizations
- Air Force Office of Scientific Research
- Stanford University
- United States Air Force