국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Dual-Pump CARS Development and Application to Supersonic Combustion
저자	Magnotti, Gaetano;; Cutler, Andrew D.
Keyword	AIR FLOW;; BURNERS;; COMPRESSIBILITY;; COMPUTATIONAL FLUID DYNAMICS;; DATA ACQUISITION;; FINITE ELEMENT METHOD;; GAS DYNAMICS;; HYDROGEN;; LASER BEAMS;; LASER PUMPING;; MATHEMATICAL MODELS;; NITROGEN;; NONUNIFORMITY;; OXYGEN;; RAMAN SPECTROSCOPY;; SUPERSONIC COMBUSTION;; SUPERSONIC COMBUSTION RAMJET ENGINES;; TEMPERATURE MEASUREMENT
URL	http://hdl.handle.net/2060/20120009473
보고서번호	NASA/CR-2012-217569
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A dual-pump Coherent Anti-Stokes Raman Spectroscopy (CARS) instrument has been developed to obtain simultaneous measurements of temperature and absolute mole fractions of N2, O2 and H2 in supersonic combustion and generate databases for validation and development of CFD codes. Issues that compromised previous attempts, such as beam steering and high irradiance perturbation effects, have been alleviated or avoided. Improvements in instrument precision and accuracy have been achieved. An axis-symmetric supersonic combusting coaxial jet facility has been developed to provide a simple, yet suitable flow to CFD modelers. Approximately one million dual-pump CARS single shots have been collected in the supersonic jet for varying values of flight and exit Mach numbers at several locations. Data have been acquired with a H2 co-flow (combustion case) or a N2 co-flow (mixing case). Results are presented and the effects of the compressibility and of the heat release are discussed.