Accession Number:

ADA067957

Title:

Interferometric Techniques and Data Evaluation Methods for the UTIAS 10 cm x 18 cm Hypervelocity Shock Tube

Descriptive Note:

Interim rept.

Corporate Author:

TORONTO UNIV DOWNSVIEW (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s):

• Ben-Dor, G.
• Whitten, B. T.

Report Date:

1979-03-01

Pagination or Media Count:

65.0

Abstract:

The UTIAS 10 cm x 18 cm Hypervelocity Shock Tube has been used in recent years to study ionizing shock structures, flat-plate and side-wall boundary layers and nonstationary oblique shock-wave diffractions over compression corners. These phenomena were recorded using a 23-cm dia field of view Mach-Zehnder interferometer equipped with a giant-pulse dual-frequency ruby laser. In order to extract the maximum amount of data in these complex flows a digital evaluation method was employed. For this technique a new approach to the theory of interference was developed. In this approach the spatial coordinates x,y of the various lines of interference fringes on the interferograms are put into digital form, thereby making a computer analysis possible. The experimental technique and instrumentation associated with the various measurements involved in research using the UTIAS 10 cm x 18 cm Hypervelocity Shock Tube are described. Finally the maximum possible absolute and relative errors associated with these measurements are calculated for four different gases argon, krypton, oxygen and nitrogen which are usually used as test gases.

Descriptors:

• *INTERFEROMETRY
• *SHOCK TUBES
• *HYPERSONIC FLOW
• *SHOCK WAVES
• NUMERICAL ANALYSIS
• DATA REDUCTION
• OPTICAL INTERFEROMETERS
• CANADA
• INTERFEROGRAMS
• EXPERIMENTAL DATA
• DATA PROCESSING

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE