In missile propulsion technology it is conventional to employ solid rocket boosters. These boosters are loaded with solid propellants, which are energetic compositions where raw materials are comprised of solid particulates, such as fuel, and oxidizer particles, in which are dispersed and immobilized throughout a binder (polymeric) matrix. The processability of these compositions is not simple ...

As technology has advanced, electronic components and systems have become smaller and more powerful. A similar trend holds for space systems, and satellites are no exception. As payloads become smaller, so too can the launch vehicles designed to carry them into orbital trajectories. An energy analysis shows that a rocket system with as low as tens of kg of fuel can be sufficient to deliver a 10...

While NASA’s current next-generation launch vehicle research has largely focused on advanced allrocket single-stage-to-orbit vehicles (i.e. the X-33 and it’s RLV operational follow-on), some attention is being given to advanced propulsion concepts suitable for “next-generation-and-a-half” vehicles. Rocketbased combined-cycle (RBCC) engines combining rocket and airbreathing elements are one cand...

A series of static hybrid rocket firings were done in a laboratory scale motor using paraffin wax fuel with gaseous oxygen and nitrous oxide oxidizers. A five element swirl injector was used to inject the oxidizer at the head end of the motor. A pyrotechnic igniter was used to initiate the combustion. The combustion of fuel grain was carried out for a fixed duration and at different oxidizer in...

An enthalpy-balance fuel-grain regression model is presented. The regression model, based on the longitudinally averaged fuel recession rates, is shown to accurately predict the chamber pressure, thrust and specific impulse performance of small and medium scale hybrid rocket motors. The key to the model predictions is the longitudinal enthalpy balance between the fuel grain heat of ablation and...

INTRODUCTION AND AIMS The ready-to-drink (RTD) market is growing rapidly, and this product category has been shown to be particularly appealing to young drinkers. The purpose of this study was to identify and describe the range and availability of RTDs available in New South Wales (NSW) (including metropolitan, regional and rural areas), with a particular focus on the variations in alcohol cont...

We relate the known Oberth effect and nonrelativistic analogue of Penrose process. When a particle decays to two fragments, we derive conditions on angles under which debris can come out for such process occur. also consider decay in relativistic case, when moves background Schwarzschild black hole. This models rocket ejects fuel. Different scenarios are analyzed depending what data fixed. The ...

An advanced LES code, named SPARK-LES, is currently under development at CIRA within the frame of the HYPROB program. The general goal of the HYPROB program, coherently with CIRA programmatic guidelines in the field of Aerospace Propulsion, is to improve CIRA design and research capabilities on Liquid Rocket Engines, and in particular on the LOx/CH4 oxidizer-fuel mixture. One of the objectives ...