Scramjet engine 조사

차례 Scramjet 이란? 가스터빈엔진과 구조적 차이점 Ramjet 과의 차이점 scramjet의 구조와 운용범위 내부 초음속연소과정 현재 운용중인 scramjet 비행체 개발중인 scramjet 비행체 reference

What is a scramjet? A scramjet is a kinetic compression(ramjet) with a supersonic air through-flow  supersonic combustion ramjet Combustion speed remains 35 μsec ± 5 μsec

가스터빈엔진과 구조적차이점(1)

가스터빈엔진과 구조적차이점(2)  ramjet Scramjet 

Ramjet 과의 차이점 Ramjet Scramjet

scramjet의 구조와 운용범위(1)

scramjet의 구조와 운용범위(2)

scramjet의 구조와 운용범위(3)

scramjet의 구조와 운용범위(4)

Premixing process                                                                                                                                      

내부초음속연소모습(1)                                                                                                                                                                         Strong Interaction in CP1 : the growth rate(dc/x) of mixing layer starts to increase significantly after CP1 Weak Interaction in CP2 , CP3: smaller density gradient between fuel and air within the mixing layer CP1 : first crossing point CP2: second crossing point CP3: third crossing point δc : mixing layer thickness

내부초음속연소모습(2)

내부초음속연소모습(3-1)

내부초음속연소모습(3-2) The mixing/combustion efficiency is increased when wedge is positioned adequately.

내부초음속연소모습(4) Supersonic Flame ( Increasing Fuel)                                                       

Supersonic Flame ( Increasing Air) 내부초음속연소모습(5) Supersonic Flame ( Increasing Air)                                                        

WHY IS IT SO EXPENSIVE?                                                                                                                   

J-58 Pratt and Whitney Engine 현재 운용중인 turbo-ramjet비행체(1) J-58 Pratt and Whitney Engine SR71

현재 운용중인 turbo- ramjet비행체(2) <<Specifications: >> Model: Pratt & Whitney J-58JT11D-20 Compressor: 9-stage, axial flow, single spool Turbine: two-stage axial flow Thrust: 32,500 lbs. with afterburner Weight: approx. 6,000 lbs. Max. operating altitude: above 80,000 ft.

Closeup of J-58 Inlet with Spike Removed SR71 엔진모습 Closeup of J-58 Inlet with Spike Removed

Scramjet Engine Hyper-X (Future) Mach 10

Reference http://jpl.snu.ac.kr/research/highspeed/supersonic/SupConcept.htm http://www.wvi.com/~lelandh/j-58~1.htm http://www.aviation-history.com/engines/ramjet.htm http://www.physics.uq.edu.au:8001/lp/lasdiag/scram.htm http://www.atse.org.au/publications/focus/focus-stalker.htm http://www.grc.nasa.gov/WWW/K-12/airplane/rampart.htm http://www.hq.nasa.gov/office/pao/History/SP-440/ch8-2.htm