Form 9.B Project Summary



Proposal Number:


Project Title:

A Pulsed Detonation Engine Ejector

Concept for High Performance


Technical Abstract (Limit 200 words)

MSE Technology Applications, Inc. (MSE)

proposes to evaluate and test a Pulsed Detonation

Engine-Ejector (PDEE) concept for hypersonic

vehicle design. Due to its high specific

performance, design simplicity, and low weight, the

Pulsed Detonation Engine (PDE) is a good

candidate for the low-speed propulsion system for

hypersonic vehicles if the PDE thrust levels can be

increased. This cannot be easily accomplished by

increased pressurization, and there is a practical

size limit on the PDE that can be integrated into the

vehicle. The ejector concept solves that problem by

using the mass flow of a secondary stream for

thrust augmentation. Using the Ramjet/Scramjet

engine as the secondary channel makes use of

existing hardware and does not increase the overall

engine weight. The proposed engine design relies

on the unsteady ejector concept, which is proven to

be much more efficient than the steady ejector,

such as the Rocket-Based Combined-Cycle

(RBCC) engine. This innovative concept also

extends the combustion regime of previous

unsteady ejector designs to the detonation mode,

which can produce higher ejector performance. The

proposed PDEE can therefore simultaneously

achieve the high specific impulse and high

thrust-to-weight required for single-stage

hypersonic vehicles.

Potential Commercial Applications (Limit 200 words)

The proposed PDE-Ejector concept can be used for

the design of the low-speed propulsion system for

hypersonic vehicles. The successful design of this

engine component is extremely important for

NASA, the Air Force, and several private-sector

companies interested in the manufacture of

reusable launch vehicles for the placement in orbit

of a constellation of satellites. The concept can be

applied to large reusable hypersonic vehicles or as

boosters to expendable vehicles. Further

refinement of the technology, notably

miniaturization and soundproofing can also lead to

cruise missile applications and the design of

propulsion systems for a wide range of military and

civilian applications. MSE is also presently

collaborating on PDE technology development with

United Technologies Research Center (UTRC) and

Pratt & Whitney, who may be partners in the

proposed R&D effort and in the commercial

development of the technology.

Name and Address of Principal Investigator (Name,

Organization Name, Mail Address, City/State/Zip)

Jean-Luc Cambier

MSE Technology Applications, Inc.

P. O. Box 4078

Butte , MT 59702

Name and Address of Offeror (Firm Name, Mail Address,


Michael R. Tuck

MSE Technology Applications, Inc.

P. O. Box 4078

Butte , MT 59702