Supersonic jet engine and method of operating the same

Patent · Tue Sep 08 04:00:00 EDT 1981

OSTI ID:5895887

Klees, G

A supersonic jet engine is disclosed capable not only of developing sufficient power to accelerate up to supersonic cruise and maintain efficient operation at supersonic cruise, but also arrange to cruise at subsonic velocities with a relatively low specific fuel consumption. The engine is provided with a variable bypass passageway downstream of the compressor. Flow into the bypass passageway is controlled so that during low power setting the bypass passageway is closed so that all the gaseous flow is directed through the turbine. During higher power settings, the bypass passageway is opened to the extent that a selected portion of the gaseous flow is directed through the bypass passageway to bypass the turbine, so that the corrected flow to the turbine remains substantially constant for both high and low power settings of the engine. The turbine has first and second stages, with the first stage receiving all of the gaseous flow that is not directed through the bypass passageway. The gaseous flow from the turbine first stage is split into first and second portions, with the first portion being directed through a coannular inner passageway to drive the turbine second stage, and the second portion of the gaseous discharge being directed toward a coannular outer passageway to be discharged in a coannular pattern radially outwardly of the first portion of gaseous flow.

• Assignee: Boeing Co The
• Patent Number(s): US 4287715
• OSTI ID: 5895887
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320201* -- Energy Conservation
Consumption
& Utilization-- Transportation-- Air & Aerospace
AIR TRANSPORT
AIRCRAFT
BYPASSES
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FLUID FLOW
FUEL ECONOMY
MACHINERY
OPERATION
SUPERSONIC TRANSPORT
TRANSPORT
TURBINES
TURBOJET ENGINES
TURBOMACHINERY