Project Title:

A Rocket Engine Leak Detection System for Hydrogen and Oxygen

13.08-9450
900913
A Rocket Engine Leak Detection System for Hydrogen and Oxygen

Abstract:

The real-time detection of fluid system leaks of gaseous hydrogen and oxygen is of
utmost importance in insuring a safe environment during the preflight launch preparation.
The goal of this program is to develop a real-time leak detection and monitoring
system for hydrogen, oxygen and nitrogen in STS applications. The objective of the
Phase I program is to develop and test several methodologies for the qualitative
and quantitative measurement of hydrogen, oxygen and nitrogen in the STS environment
based on the utilization of a direct spectroscopic technique, Raman spectroscopy.
The major advantages of our Raman-based system include real-time response, quantitative
and qualitative analysis capabilities, simultaneous multicomponent detection, no
moving parts, low detection limits (<1 ppm) and intrinsic safety. Since Raman techniques
are highly adaptable to fiber optics, an integrated network of reliable, selective,
low maintenance sensors can be developed that respond rapidly and provides both ample
warning time before hydrogen or oxygen concentrations approach dangerous levels and
the location of the leak. The objective of the Phase II program will be to develop,
field test, and deliver both a lightweight (<2 pounds) vibration resistant self-contained
unit and a centrally based integrated network.
The development of a reliable, integrated multigas sensor network will find extensive
use in many of NASA related applications, such as in facilities where fuel is processed,
stored or used and/or inflight lead detection. The technique can be adapted to both
new and existing NASA facilities for monitoring and detecting fuel leaks. Commercial
applications for the Raman monitoring instrument exist in water pollution, forensics,
and industrial process control.
hydrogen, oxygen, leaks, raman, fiber optic, nitrogen, sensor