The paper presents an overview of current and prospective applications of Ni3Al based intermetallic alloys—modern engineering materials with special properties that are potentially useful for both structural and functional purposes. The bulk components manufactured from these materials are intended mainly for forging dies, furnace assembly, turbocharger components, valves, and piston head of in...

A study of the different mechanisms controlling the initial stages of a fire in a micro-gravity environment is presented. Three different processes are deemed important for evaluation of material flammability, piloted ignition, co-current and counter-current flame spread. The three processes are evaluated in terms of thermal theory and the different material properties controlling these combust...

Recent advances in laser peening technology, also known as laser shock processing (LSP) are reported. Specific emphasis is placed on its development in the micro scale regime. LSP imparts desirable residual stress distributions into the target material in order to improve the fatigue life of the material. In modeling improvements, plasma expansion is modeled as laser supported combustion wave, ...

Combustion chambers of micro gas-turbines are generally operated under very lean global air-fuel ratios for two main reasons: to constrain the production pollutants (NOx), and cool-down metal walls with cooling air. The abundancy oxygen contained in air flowing over surfaces, together high temperatures due combustion, constitute an oxidizing environment. thin oxide layer can crack alternating s...

Title of Dissertation: EVALUATING SURFACE MECHANISMS FOR CATALYTIC COMBUSTION OF H2 AND CH4 ON Pd CATALYSTS Seyed-Abdolreza Seyed-Reihani, Doctor of Philosophy, 2005 Dissertation directed by: Associate Professor Gregory Jackson Department of Mechanical Engineering Applications of fuel-lean catalytic combustion for power generation and exhaust heat recovery have raised the desire for reactor opt...

The results of an experimental study of the combustion of single aluminum particles in N2/O2, Ar/O2, and He/O2 gas mixtures, and in pure O2 are presented and interpreted. This research focuses on identifying conditions under which asymmetric combustion of the aluminum particles develops. It also illustrates the relationship between aluminum particle combustion behavior and particle internal and...

In this study, the effect of the levels of hydrogen addition to methane-air premixed flame in a micro-stepped reactor has been studied numerically. In addition, the effects of mixture velocity and walls’ thermal conductivity (Kw) on the flame’s location, temperature, and species distribution in a micro reactor were calculated using a 2D numerical laminar steady code. The results showed that an ...