CaltechAUTHORS
  A Caltech Library Service

Expansion Tube Freestream Disturbance Measurements using a Focused Laser Differential Interferometer

Lawson, Joel M. and Austin, Joanna M. (2020) Expansion Tube Freestream Disturbance Measurements using a Focused Laser Differential Interferometer. In: AIAA Scitech 2020 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2020-1064. ISBN 978-1-62410-595-1. https://resolver.caltech.edu/CaltechAUTHORS:20200113-082059519

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20200113-082059519

Abstract

A focused laser differential interferometer (FLDI) is applied to Caltech's Hypervelocity Expansion Tube (HET). FLDI is shown to be sensitive enough to make high-bandwidth measurements of flow features at low-density conditions. The freestream disturbance level is quantified as a function of the sound speed ratio across the primary contact surface. This is done to experimentally investigate whether the freestream disturbances obey the acoustic wave theory proposed by Paull and Stalker. It is found that disturbance magnitudes generally decrease with reductions in this sound speed ratio, as predicted by the theory, but some anomalous results are observed that suggest additional controlling parameters beyond the acoustic model.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2020-1064DOIArticle
Additional Information:© 2020 American Institute of Aeronautics and Astronautics. Published Online: 5 Jan 2020.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2020-1064
Record Number:CaltechAUTHORS:20200113-082059519
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200113-082059519
Official Citation:Expansion Tube Freestream Disturbance Measurements using a Focused Laser Differential Interferometer. Joel M. Lawson and Joanna M. Austin. AIAA Scitech 2020 Forum. January 2020; doi: 10.2514/6.2020-1064
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100658
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Jan 2020 18:15
Last Modified:13 Jan 2020 18:15

Repository Staff Only: item control page