1998/1999 Trap Wing Data Archive

The Trapezoidal Wing model was tested in the Langley 14x22 FST for approximately five double-shift weeks during the Fall of 1998. The test was a joint test between the Advanced Subsonic Technology  (AST) High-Lift Program and the AST Airframe Noise Program. Approximately four double-shift weeks were devoted to installation and high-lift testing and one double-shift week was devoted to airframe noise testing and model removal.

The purpose of this entry was to establish the characteristics of this model prior to the 12 Foot PWT test and to obtain a one atmosphere, low wind tunnel wall interference data set that could be corrected to free air conditions.

Installation of the model in the test section began on August 26th, and air was first blown over the model on September 2nd.  The test was completed (including model removal) on September 29th.  A total of 93 runs were recorded during the test: 51 for the  fullspan flap configuration, 21 for the "high-lift part span flap" configuration and 21 for the "airframe noise part-span flap" configuration (the latter flap was an aluminum flap specially instrumented for airframe noise measurements).  Several measurement and visualization techniques were employed during the test to provide the CFD community with not only force and pressure data, but transition, boundary layer and wake deficit data as well.  Below is a summary of the various techniques employed (clicking on link will provide more detailed information):
 
 

Force and pressure (FP), IR (Infared) and 7-hole probe runs were conducted at Mach = 0.20 for a Reynolds number based on mean aerodynamic chord of 4.3 million.  Below are tables describing the configurations that were tested.
 
 

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Page Curator and NASA Official Responsible for Content
Judith A. Hannon  

Last Updated
August 5, 2011