Accession Number:

ADA237997

Title:

Separation-Bubble Velocity Measurements Using an Oscillating-Hot-Wire System.

Descriptive Note:

Final technical rept.,

Corporate Author:

ARIZONA STATE UNIV TEMPE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

1991-06-01

Pagination or Media Count:

27.0

Abstract:

A system is developed to allow measurement of both the mean and disturbance flow velocities in separated regions. An oscillating-arm assembly provides a directional bias to the hot-wire probe, along with a linear-step assembly, which steps the probe through the boundary layer. This system is used to investigate the flow field associated with laminar separation bubbles. A series of velocity profiles are measured on an FX63-137 airfoil in the chord- Reynolds-number range 150,000 or R sub c or 300,000, at angles of attack of alpha 12 deg and alpha 14 deg. Data are presented on the size of the separation bubble and on the location of transition to turbulence.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE