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Full-Text Articles in Aerospace Engineering
The Early Propagation And Burning Of Hydrogen In The Process Of The Deflagration To Detonation Transition, Rom Amasay
The Early Propagation And Burning Of Hydrogen In The Process Of The Deflagration To Detonation Transition, Rom Amasay
Honors Undergraduate Theses
The safe and efficient propagation of the Deflagration to Detonation Transition (DDT) is a topic that has been researched for many years due to its applications in Aerospace and Mechanical Engineering. DDT is when fire caused by the burning of fuel is accelerated to the upper CJ point on the Rankine Hugoniot curve due to instabilities in the flame and the turbulence caused by these instabilities. The complex flame dynamics that go along with DDT have ensured that the process is yet to be fully understood and defined. This research will work towards observing the early stages of burning hydrogen-air …
Strategies To Reduce Nonconformance Of Parts In Aerospace Manufacturing, John Louis Lloyd Jr
Strategies To Reduce Nonconformance Of Parts In Aerospace Manufacturing, John Louis Lloyd Jr
Walden Dissertations and Doctoral Studies
The cost of nonconformance of parts can impact the aerospace industry globally, resulting in revenue loss and consumer confidence degradation. Grounded in the eight disciplines of problem solving, the purpose of this multiple case study was to explore strategies aerospace manufacturing quality managers in the United States used to implement successful change initiatives to address the nonconformance of parts. Data were collected through semistructured interviews with four aerospace quality executives and supporting company documents. Data were analyzed using methodological triangulation, coding, and thematic analysis. Four themes emerged: (a) identify and implement a specific problem-solving strategy, (b) identify and mitigate employee …
Cfd And Heat Transfer Analysis Of Rocket Cooling Techniques On An Aerospike Nozzle, Geoffrey Sullivan
Cfd And Heat Transfer Analysis Of Rocket Cooling Techniques On An Aerospike Nozzle, Geoffrey Sullivan
Electronic Theses and Dissertations
In recent years the development of rocket engines has been mainly focused on improving the engine cycle and creating new fuels. Rocket nozzle design has not been changed since the late 1960s. Recent needs for reliable and reusable rockets, as well as advancements in additive manufacturing, have brought new interest into the aerospike nozzle concept. This nozzle is a type of altitude adjusting nozzle that is up to 90% more efficient than bell nozzles at low altitudes and spends up to 30% less fuel. Since the nozzle body is submerged in the hot exhaust gasses it is difficult to keep …