Pulse detonation engines hold promise to increase performance of air-breathing propulsion systems by taking advantage of the increase in cycle efficiency due to the constant-volume heat addition characteristics of detonative combustion. A pulse detonation engine (PDE) produces thrust through the… More

Use of fluidic injection of high-pressure air is proposed to improve nozzle performance and reduce the off-axis component of thrust at off-design flight conditions, generally at low Mach number and low pressure ratio. Hypersonic flight vehicles are typically designed with a high expansion ratio… More

Pulse detonation engines hold promise to increase performance of air-breathing propulsion systems by taking advantage of the increase in cycle efficiency due to the constant-volume heat addition characteristics of detonative combustion. SPIRITECH is developing a pulse detonation engine, the Rotating… More

Use of fluidic injection of high-pressure air is proposed to improve a hypersonic vehicle's installed nozzle performance and eliminate undesirable pitching moments at off-design, transonic flight conditions. Hypersonic flight vehicles are typically designed with a high expansion ratio Single… More

The future of manned and unmanned vehicles requires significant improvements in engine thrust-to-weight ratio, efficiency, length, and cost. These improvements may be realized in the afterburner for supersonic missiles, Mach 8-10 strike/reconnaissance aircraft, and hypersonic vehicles operating with… More

The future of manned and unmanned vehicles requires significant improvements in engine thrust-to-weight ratio, efficiency, length, and cost. These improvements may be realized in the afterburner for supersonic missiles, Mach 8-10 strike/reconnaissance aircraft, and hypersonic vehicles operating with… More

Ceramic Matrix Composites (CMC's) offer substantial weight reductions over metallic components, increasing vehicle range and/or payload, as well as reducing cooling flow requirements, thereby increasing overall engine performance and enabling high supersonic flight. Many CMC's exhibit higher… More

A ramjet/scramjet heat exchanger design and optimization tool is proposed for rapid analyses of complex thermal cooling systems. In the emerging field of high-speed aerospace, it is necessary that rapid modeling of complex thermal systems be accomplished to enable the trade studies required to… More

The future of manned and unmanned vehicles requires significant improvements in engine thrust-to-weight ratio, efficiency, and engine operating temperatures. One area where these improvements may be realized is in the main combustor for supersonic missiles, Mach 8-10 strike/reconnaissance aircraft,… More

A Scramjet/Ramjet Heat Exchanger Analysis Tool (SRHEAT(TM)) is proposed for rapid design and optimization of complex thermal cooling systems. The basic SRHEAT(TM) code was developed under the Phase I SBIR. The objective of this Phase II program is to enhance the current SRHEAT(TM) code functions by… More

A Heat Exchanger analytical tool is proposed for rapid thermal analysis and design optimization of advanced heat exchangers. The numerical model incorporates a user-friendly interface capable of modeling the details of the heat load calculation throughout the heat exchanger, including the details of… More

A multi-component, multiphase flow model is proposed for modeling fuel/coolant properties throughout a fuel-cooled flow network for advanced thermal management systems. The Phase I program will develop a multiphase model to quantify the effects of the working fluids under multiphase conditions so… More

The current state-of-the-art for heat exchanger analysis and design relies heavily on analytical approaches which are immature and highly empirical, thus making the ability to optimize advanced heat transfer devices improbable without comprehensive characterization efforts. To address this problem,… More

A passive screech suppressing augmentor liner concept is proposed to absorb acoustic energy at frequencies below 1 kHz. Acoustic, or screech, liners have historically been designed to affect modes whose frequencies are greater than 1 kHz. Liners have proven to be a cost effective and lightweight way… More

A unique modular heat exchanger (HEX) incorporating Phase Change Material (PCM) is proposed for storing high transient thermal loads in the F-35 aircraft. The modular HEX employs a foam metal lattice within the PCM to enhance conduction. In addition, a foam metal lattice is included within the fuel… More

ABSTRACT: This Phase I program proposes conceptual design and proof-of-concept acoustic testing of a unique nozzle concept for providing significant reductions in jet noise. These reductions are achieved through application of nozzle design features that address different jet noise reduction… More

This Phase I program proposes use of a Heat Exchanger / Reactor (HEX Reactor) to address thermal management challenges for next generation fighter aircraft. In the proposed application, a HEX Reactor converts excess heat energy into storable energy by harnessing the large energy requirements of… More