With the rapid development of world economy and technology, engine technology has made a series progress in aerospace field. However, problems environmental pollution energy crisis are becoming more serious. The advanced aircraft engines can contribute to thrust-to-weight ratio, fuel consumption rate, lifetime cost, pollutant emission, safety reliability, etc., reducing flight costs. This paper...

PO 107‐1 Design, Development and Evaluation of a Noise Control Enclosure for a Model Jet Engine J. Black, J. Rinker, R. Yon, C. Holder, U.S. Air Force, Wright‐Patterson AFB, OH; J. Slagley, School of Aerospace Medicine, Wright‐ Patterson AFB, OH. Situation/problem: A cart‐mounted model jet engine used for educational demonstrations produced a sound pressure level (SPL) of 89.1 dB at a distance...

Although originally discovered in the 18th century [1], the titanium industry did not experience any significant advancement until the middle of the 20th century through the development of the gas turbine engine [2]. Since then, the aerospace sector has dominated worldwide titanium use with applications in both engines and airframe structures [3]. The highly desirable combination of properties,...

Sixty percent of the failures launch vehicles in ascending phase occur propulsion system. Among them, vibration generated by engine is an important factor occurrence failure. At present, health assessment methods aerospace field are mostly for specific equipment, and scholars assess real-time status vehicle engines which can only reflect current vehicle. Existing cannot be applied to different ...

The consideration of safety issues in the operation of helicopters involves the capability to perform emergency descending maneuvers through the autorotation principle when the engine is no longer supplying power. When comparing manned and unmanned helicopters, the lower rotor inertia of UAV configurations makes this functionality even more challenging for the pilot since more accurate timing a...

Because of their potential reductions fuel consumption, disruptive propulsion concepts such as boundary layer ingestion have lately earned the attention aerospace community. increased level interactions brought by tight airframe–propulsor integration, an accurate assessment this benefit requires a detailed study engine behavior from both aerodynamics and overall performance standpoint. In conte...