General aviation aircraft engine noise test facility

2000 ◽  
Author(s):  
H. Patrick ◽  
K. Lobo ◽  
H. Tada
Keyword(s):  
Aircraft Engine ◽  
General Aviation ◽  
Test Facility ◽  
Engine Noise ◽  
Noise Test ◽  
General Aviation Aircraft

Hearing Thresholds among Pilots and Non-Pilots: Implications for Auditory Warning Design

1998 ◽  
Vol 42 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Dennis B. Beringer ◽  
Howard C. Harris ◽  
Kurt M. Joseph
Keyword(s):  
Environmental Exposure ◽  
Phase 1 ◽  
Aircraft Engine ◽  
General Aviation ◽  
Phase 2 ◽  
Engine Noise ◽  
Threshold Data ◽  
Hearing Thresholds ◽  
Auditory Warning ◽  
General Aviation Aircraft

Observations in simulator studies suggested that the older segments of the General Aviation pilot population were having difficulty hearing specific auditory warnings in the cockpit. These observations, in combination with data from Tobias (1968a; 1968b; 1972), prompted a reexamination of the hearing capabilities of pilots and non-pilots. In Phase 1, threshold data were collected for 150 non-pilots and 150 pilots using stratified age sampling. The usual higher-frequency decrements attributable to aging and general environmental exposure were found in both samples. Significant differences were found between the non-pilot and pilot samples, with greater threshold shifts between 2 and 6 kHz in evidence among the pilots. In Phase 2, individuals were exposed to simulated aircraft engine noise and asked to detect and identify both conventional and novel auditory warning sounds. Results of both phases are discussed in terms of implications for the design of auditory warnings for General Aviation aircraft.

scholarly journals Lead Memory in General Aviation Aircraft Engine Emissions

2012 ◽  
Vol 1 (2) ◽  
pp. 74-78
Author(s):  
Randal DeMik ◽  
Jason Keleher ◽  
Natalie Kasak ◽  
Julius Keller ◽  
Alessandro Mazza ◽  
...  
Keyword(s):  
Aircraft Engine ◽  
General Aviation ◽  
Engine Emissions ◽  
General Aviation Aircraft

The Analysis on the Effect of Ground Reflection in the Noise Test of Aircraft Engine

2013 ◽  
Vol 860-863 ◽  
pp. 2256-2260
Author(s):  
Guo Hua Yan ◽  
Shuai Chang ◽  
Yong Lei Zhang
Keyword(s):  
Sound Pressure Level ◽  
Sound Pressure ◽  
Free Field ◽  
Aircraft Engine ◽  
Pressure Level ◽  
Engine Noise ◽  
Certification Procedure ◽  
Noise Test ◽  
The Impact ◽  
Field Sound

The data processing of static engine noise test, especially the elimination of ground reflection to access the free-field sound pressure level, has been defined as one of the basic steps in aircraft noise prediction on the noise certification procedure by ICAO[1,. Based on the importance of the method, this paper will study the impact of the ground reflection effects on the aircraft engine noise experimental, especially made a detailed overview for the calculation method of reflective index.This paper also gives the method of fixing this effect to get the free field sound pressure level, while making experiments to verify the feasibility of this method, so that make the noise analysis and prediction according to the noise certification procedures.

Preliminary Wing Study of General Aviation Aircraft with Stitched Composite Panels

2017 ◽  
Vol 54 (2) ◽  
pp. 704-715 ◽  
Author(s):  
Vasileios S. Papapetrou ◽  
Ali Y. Tamijani ◽  
Daewon Kim
Keyword(s):  
General Aviation ◽  
Composite Panels ◽  
General Aviation Aircraft

A Flight Simulation Vision for Aeropropulsion Altitude Ground Test Facilities

2005 ◽  
Vol 127 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Milt Davis ◽  
Peter Montgomery
Keyword(s):  
System Performance ◽  
Engine Performance ◽  
Aircraft Engine ◽  
Flight Simulation ◽  
Propulsion System ◽  
Test Facility ◽  
Flight Testing ◽  
Test Environment ◽  
Ground Test ◽  
Aircraft System

Testing of a gas turbine engine for aircraft propulsion applications may be conducted in the actual aircraft or in a ground-test environment. Ground test facilities simulate flight conditions by providing airflow at pressures and temperatures experienced during flight. Flight-testing of the full aircraft system provides the best means of obtaining the exact environment that the propulsion system must operate in but must deal with limitations in the amount and type of instrumentation that can be put on-board the aircraft. Due to this limitation, engine performance may not be fully characterized. On the other hand, ground-test simulation provides the ability to enhance the instrumentation set such that engine performance can be fully quantified. However, the current ground-test methodology only simulates the flight environment thus placing limitations on obtaining system performance in the real environment. Generally, a combination of ground and flight tests is necessary to quantify the propulsion system performance over the entire envelop of aircraft operation. To alleviate some of the dependence on flight-testing to obtain engine performance during maneuvers or transients that are not currently done during ground testing, a planned enhancement to ground-test facilities was investigated and reported in this paper that will allow certain categories of flight maneuvers to be conducted. Ground-test facility performance is simulated via a numerical model that duplicates the current facility capabilities and with proper modifications represents planned improvements that allow certain aircraft maneuvers. The vision presented in this paper includes using an aircraft simulator that uses pilot inputs to maneuver the aircraft engine. The aircraft simulator then drives the facility to provide the correct engine environmental conditions represented by the flight maneuver.

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