Results 41 to 50 of about 8,114 (97)

Advanced General Aviation Turbine Engine (GATE) concepts [PDF]

open access: yes
Concepts are discussed that project turbine engine cost savings through use of geometrically constrained components designed for low rotational speeds and low stress to permit manufacturing economies.
Lays, E. J., Murray, G. L.
core   +1 more source

Design and evaluation of an integrated Quiet, Clean General Aviation Turbofan (QCGAT) engine and aircraft propulsion system [PDF]

open access: yes
The design was based on the LTS-101 engine family for the core engine. A high bypass fan design (BPR=9.4) was incorporated to provide reduced fuel consumption for the design mission. All acoustic and pollutant emissions goals were achieved.
Fogel, P., German, J., Wilson, C.
core   +1 more source

Small Engine Component Technology (SECT) studies [PDF]

open access: yes
A study was conducted to identify component technology requirements for small, expendable gas turbine engines that would result in substantial improvements in performance and cost by the year 2000.
Harbour, L., Meyer, P. K.
core   +1 more source

Design and performance of duct acoustic treatment [PDF]

open access: yes, 1991
The procedure for designing acoustic treatment panels used to line the walls of aircraft engine ducts and for estimating the resulting suppression of turbofan engine duct noise is discussed.
Kraft, R. E., Motsinger, R. E.
core   +1 more source

Aircraft turbofan noise [PDF]

open access: yes
Turbofan noise generation and suppression in aircraft engines are reviewed. The chain of physical processes which connect unsteady flow interactions with fan blades to far field noise is addressed.
Groeneweg, J. F., Rice, E. J.
core   +1 more source

Multivariate Analysis, Retrieval, and Storage System (MARS). Volume 1: MARS System and Analysis Techniques [PDF]

open access: yes
A method for rapidly examining the probable applicability of weight estimating formulae to a specific aerospace vehicle design is presented. The Multivariate Analysis Retrieval and Storage System (MARS) is comprised of three computer programs which ...
Hague, D. S.   +2 more
core   +1 more source

Exhaust emission survey of an F100 afterburning turbofan engine at simulated altitude flight conditions [PDF]

open access: yes
Emissions of carbon monoxide, total oxides of nitrogen, unburned hydrocarbons, and carbon dioxide from an F100, afterburning, two spool turbofan engine at simulated flight conditions are reported. For each flight condition emission measurements were made
Cullom, R. R., Moss, J. E.
core   +1 more source

Gaseous exhaust emissions from a JT8D-109 turbofan engine at simulated cruise flight conditions [PDF]

open access: yes
Gaseous emissions from a JT8D-109 turbofan engine were measured in an altitude facility at four simulated cruise flight conditions: Mach 0.8 at altitudes of 9.1, 10, 7, and 12.2 km and Mach 0.9 at 10.7 km.
Diehl, L. A., Holdeman, J. D.
core   +1 more source

Preliminary Evaluation of a Turbine/Rotary Combustion Compound Engine for a Subsonic Transport [PDF]

open access: yes
The fuel consumption of a modern compound engine with that of an advanced high pressure ratio turbofan was compared. The compound engine was derived from a turbofan engine by replacing the combustor with a rotary combustion (RC) engine. A number of boost
Civinskas, K. C., Kraft, G. A.
core   +1 more source

Outdoor test stand performance of a convertible engine with variable inlet guide vanes for advanced rotorcraft propulsion [PDF]

open access: yes
A variable inlet guide van (VIGV) type convertible engine that could be used to power future high-speed rotorcraft was tested on an outdoor stand. The engine ran stably and smoothly in the turbofan, turboshaft, and dual (combined fan and shaft) power ...
Mcardle, Jack G.
core   +1 more source

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