Engineering topics
Beheim, M. A.
Publications and source records attributed to Beheim, M. A..
NASA research in aircraft propulsion
A broad overview of the scope of research presently being supported by NASA in aircraft propulsion is presented with emphasis on Lewis Research Center activities related to civil air transports, CTOL and V/STOL systems. Aircraft systems work is performed to identify the requirements for the propulsion system that enhance the mission capabilities of the aircraft. This important source of innovation and creativity drives the direction of propulsion research. In a companion effort, component research of a generic nature is performed to provide a better basis for design and provides an evolutionary process for technological growth that increases the capabilities of all types of aircraft. Both are important.
Executive summary of Aircraft Icing Specialists Workshop
In a period of escalating development costs for new aircraft, there is growing interest in a renewed and coordinated icing research effort to achieve an updating or modernization of each aspect of the technological issues that are involved. This includes the data base, analysis methods, test techniques, and test facilities.
Design objectives - Air transportation
The mainline of air transportation is expected to continue to be based on the medium to long haul turbine powered subsonic aircraft. With greater emphasis on energy conservation, there will be considerable interest in making additional progress in propulsion system efficiency. Continued improvement in turbofan engines is expected to occur, but there may be a less conventional approach in the background. Opportunities for expanding short haul air services will certainly materialize. The outlook for supersonic air transport is less clear because of complex political and economic factors.
Propulsion technology for an advanced subsonic transport
Engine design studies for future subsonic commercial transport aircraft were conducted in parallel with airframe studies. These studies surveyed a broad distribution of design variables, including aircraft configuration, payload, range, and speed, with particular emphasis on reducing noise and exhaust emissions without severe economic and performance penalties. The results indicated that an engine for an advanced transport would be similar to the currently emerging turbofan engines. Application of current technology in the areas of noise suppression and combustors imposed severe performance and economic penalties.
Advanced propulsion - Cleaner and quieter.
Studies were conducted to determine the factors which are significant in advancing propulsion technology. The studies surveyed a wide distribution of variables including aircraft configuration, payload, range, and speed. System studies placed major emphasis on reducing noise and exhaust emissions while attaining good economies and performance. An engine for an advanced transport will probably superficially resemble the presently emerging generation of modern high-bypass and high-temperature turbofan engines, but would incorporate the advances in component and system technology identified by the propulsion system studies. These advances could be used to improve aircraft economics significantly with no increase in noise, or to significantly reduce noise and pollution with few or no economic penalties.
Supersonic exhaust nozzles
Design and characteristics of exhaust system for supersonic aircraft
Variable geometry requirements in inlets and exhaust nozzles for high Mach number applications.
Variable geometry supersonic aircraft design, discussing inlet and exhaust nozzles problems and wind tunnel tests
Variable geometry requirements in inlets and exhaust nozzles for high Mach number applications
Variable geometry requirements in exhaust nozzles and inlets for high Mach number applications
WIND TUNNEL STUDIES OF BOOSTER BASE HEATING
Analytical and experimental studies of rocket- booster base flow
Off-Design Performance of Divergent Ejectors
Off-design performance of divergent ejectors
Off-design ejector performance
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Performance of Twin-duct Variable-geometry Side Inlets at Mach Numbers of 1.5 to 2.0
Supersonic wind tunnel test of twin-duct variable geometry side inlets
PERFORMANCE OF VARIABLE TWO-DIMENSIONAL INLET DESIGNED FOR ENGINE-INLET MATCHING. I - PERFORMANCE AT DESIGN MACH NUMBER OF 3.07
Supersonic performance of variable two-dimensional inlets designed for engine-inlet matching