국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Status of the Combined Cycle Engine Rig
저자	Saunders, Dave;; Slater, John;; Dippold, Vance
Keyword	SUPERSONIC COMBUSTION RAMJET ENGINES;; PREDICTION ANALYSIS TECHNIQUES;; SYSTEMS INTEGRATION;; RAMJET ENGINES;; HYPERSONICS;; AIR FLOW;; FABRICATION;; PROPULSION;; CYCLES;;
URL	http://hdl.handle.net/2060/20100042192
보고서번호	E-17575
발행년도	2009
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Status for the past year is provided of the turbine-based Combined-Cycle Engine (CCE) Rig for the hypersonic project. As part of the first stage propulsion of a two-stage-to-orbit vehicle concept, this engine rig is designed with a common inlet that supplies flow to a turbine engine and a dual-mode ramjet / scramjet engine in an over/under configuration. At Mach 4 the inlet has variable geometry to switch the airflow from the turbine to the ramjet / scramjet engine. This process is known as inlet mode-transition. In addition to investigating inlet aspects of mode transition, the rig will allow testing of turbine and scramjet systems later in the test series. Fully closing the splitter cowl "cocoons" the turbine engine and increases airflow to the scramjet duct. The CCE Rig will be a testbed to investigate integrated propulsion system and controls technology objectives. Four phases of testing are planned to 1) characterize the dual inlet database, 2) collect inlet dynamics using system identification techniques, 3) implement an inlet control to demonstrate mode-transition scenarios and 4) demonstrate integrated inlet/turbine engine operation through mode-transition. Status of the test planning and preparation activities is summarized with background on the inlet design and small-scale testing, analytical CFD predictions and some details of the large-scale hardware. The final stages of fabrication are underway.