AEROSPACE 410

AEROSPACE PROPULSIONLecture (10/25/2002)RAMJET ANALYSIS

IDEAL RAMJET AND ACTUAL RAMJET DESIGN

Dr. Cengiz Camci

RAMJETS WITHSUBSONIC COMBUSTORS

PossibleRamjetconfigurations

IN ORDER FOR A RAMJET TO BE OPERATIONALA FLIGHT SPEED OF AT LEAST SONIC VELOCITY

IS REQUIRED Appr. 740 miles/hour

A MAJOR DRAWBACK OF A RAM JETIS ITS HIGH RATE FUEL CONSUMPTION

A RAM JET UNIT CAN PRACTICALLY REACHMACH 5 (LOW HYPERSONIC)

AERODYNAMIC FRICTION WILL MELTANY RAMJET STRUCTURE DESIGNED FOR

MACH=3-4

RAM JET SYSTEM

DEVELOPED BYMARQUARDT AIRCRAFT COMPANY

BO-MARC PROGRAMBOEING & UNIV. OF MICHIGAN AERONAUTICAL RESEARCH CENTER

LONG RANGE INTERCEPTOR

EARLY BOMARC SUPERSONIC RAM JET

MACH = 2.0 @ 48,000 Feet

48 inch ramjet

FINAL FLIGHTMACH = 2.5 @ 42,000 feet 31 miles

Solid propellantIs cast into the special cavityIn the core of the engine

FUELINJECTORS

VIEW FROMRAMJET EXHAUSTNOZZLE (FROM OUTSIDE)

SOLID PROPELLANTROCKET ENGINE

Throat ofSupersonic nozzle

MACH = 3.95 @ 55,000 FEETMACH = 2.94 @ 95,000 FEET

X-7 CONFIGURATION 2000 mph

RAMJET

TAKE-OFF WITH A SOLIDROCKET BOOSTER

RAMJETS STARTAT SONIC VELOCITYAT ABOUT740 MILES/HOUR

BO-MARC

FIRST MODERN CRUISE MISSILE

BRITISH RAM-JET DEVELOPMENTS

RED- DUSTER SAM

THOR

SEA-DART

THOR RAMJET DEVELOPMENT

SEA-DART MACH = 3.5 design

High altitude interceptor

SURFACE TO AIR RAM-JET MISSILE SRARM

Solid rocket booster

ODIN R&R ramjet

LAND DART

SEA DART

RED-DUSTER