The novel approach described in this proposal has the potential to allow designers of solid propellant rocket motors to assess the impact of their design choices on motor stability during the preliminary design phase of the motor development cycle. The potential cost savings to the government and… More

Chemical kinetics based solid propellant combustion predictive capabilities have developed to the point where it is possible to compute combustion properties of solid propellants. Specifically burning rates over a range of pressures and temperatures.This capability will reduce the time, effort, and… More

The opportunity addressed in this proposal is to transfer a fuel-additive technology developed for NOx and particulate matter reduction in diesel fuels, to applications in ultra-efficient jet engine fuels, with no reduction in performance and power output of the engine. The innovation is based on a… More

Chemical kinetics based solid propellant combustion predictive capabilities have developed to the point where it is possible to compute combustion properties of solid propellants. Specifically, burning rates over a range of pressures and temperatures.This capability will reduce the time, effort,… More

"New requirements for modern gun systems have greatly increasedthe propellant flame temperature and reactivity of the combustionproducts. As a result, thermochemical erosion can greatlyreduced the service life of the gun tubes in these systems.Coatings and liners have been used to mitigate erosion,… More

"New requirements for modern gun systems have greatly increased the propellant flame temperature and reactivity of the combustion products. As a result, thermochemical erosion can greatly reduced the service life of the gun tubes in these systems.Coatings and liners have been used to mitigate… More

"Software & Engineering Associates, Inc., proposes to develop a new tool to analyze solid rocket motor combustion stability which will predict for an unstable motor the combustion chamber's maximum over-pressurization. When a rocket motor experiencescombustion instability, it often does not… More

"Solid rocket motors are subject to combustion stability problemswhen the interior combustion processes interact with thecombustion chamber's acoustic modes, resulting in large pressureamplitude fluctuations. While the initial excitation process canbe predicted using linear analysis, the… More

Design of a high performance hydrocarbon liquid rocket engine (LRE) requires a thorough understanding of the heat transfer and cooling requirements of LRE's. An efficient cooling system is crucial in extending engine life and minimizing pumping power. Itis essential to be able to accurately… More

Liquid rocket engines may be run for repeatedly over extended periods of time, requiring active cooling. An efficient means of cooling LRE nozzles involves using the liquid fuel or oxidizer itself to provide the cooling, often referred to as regenerative cooling. SEA's liquid rocket combustion… More

New requirements for modern gun systems have greatly increased the propellant flame temperature and reactivity of the combustion products. As a result, thermochemical erosion can greatly reduced the service life of the gun tubes in these systems. Coatings, liners, additives, and deterred… More

The demand for higher performance rocket motors at a reduced cost requires continuous improvements in understanding and controlling propellant combustion. Numerous examples are available where seemingly minor modifications and improvements to existing solid rocket systems have caused previously… More

This Small Business Technology Transfer (STTR) Phase I project is to determine the feasibility of developing a hydrodynamic combustion stability analysis design tool for rockets, gas turbines, and large engines. As combustors are run at leaner mixture ratios to avoid NOx pollutant issues, vortex… More

A modeling and experimental program is proposed with the goal of reducing the mean size of metal oxide droplets in the exhaust of solid propellant rocket motors (SRMs). The proposed effort looks at all aspects of metal combustion and discrete phase dynamics which occur in SRMs and offers approaches… More

New requirements for modern gun systems have greatly increased the propellant flame temperature and reactivity of the combustion products. As a result, thermochemical erosion can greatly reduced the service life of the gun tubes in these systems. Coatings, liners, additives, and deterred… More

The ability for engineers to assess the impact of their preliminary design of solid rocket motor (SRM) performance and combustion stability is the focus of this proposal. The SRMs of the future will be designed for increased performance. Since ballistic excursions, instabilities, and sporadic forces… More