Executive Summary : | The study aims to develop an ADN-based green liquid propellant for liquid rocket motors, which has the potential to replace carcinogenic hydrazine-based propellants in the future. The research will involve extensive experimental and simulation investigations to study evaporation, ignition, bubble and fluid dynamics, and other parameters of ADN-based green propellants with various liquid fuels, including methanol, ethanol, acetone, and isopropyl alcohol. Numerical simulation will involve developing a multiphase computational model for the ADN droplet with the necessary properties, which will be validated based on experiments. The experimental work will involve characterization studies of prepared propellant samples using techniques such as TGA/DSC, viscometer, bomb calorimeter, and liquid density analyzer. A single propellant droplet will be injected through a syringe pump on a heated surface inside a pressurized chamber, mixed with nano metallic powders (aluminum and boron) to examine their effect on evaporation and fluid dynamics characteristics. The study will also explore the influence of various propellant combinations, chamber environment, heated metal surface roughness, and pressure on evaporation, ignition probability, and bubble and fluid dynamics when liquid interacts with hot surfaces, such as combustion chamber walls, nozzle walls, feedlines, pumps, and valves. The study will be captured using a high-speed camera, and the study will also explore the spray combustion characteristics of ADN-based liquid propellants. |