Minimum hot surface ignition temperature diagnostics including infrared imagery
Hot surface ignition caused by a leak from ruptured fuel or hydraulic lines impinging on high temperature engine surfaces poses dangers to both the automotive and aviation industries. Many previous studies have investigated the aircraft engine nacelle environments most conducive to hot surface ignition, but alterations and improvements in turbofan engine design have left many of these studies obsolete or in need of expansion. A literature review is presented to survey these previous studies. Particular emphasis is made on a study conducted under the Air Force Wright Aeronautical Laboratory at Wright-Patterson Air Force Base. Additionally, a distinction is made between hot surface ignition and auto-ignition. Finally, the design and verification of a new experimental apparatus to investigate hot surface ignition for modern turbofan engines is presented. Supplementary experiments including infrared imaging on a quiescent hot surface are also described.
Gore, Purdue University.
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