High-Speed, Noninvasive, Multi-Parameter Laser Diagnostics for Transonic Flows, Phase II

Metadata Updated: February 28, 2019

Numerous ground-test and wind-tunnel facilities are used extensively to make surface measurements of and to characterize the forces and moments encountered by aeronautics test articles. Quantitative results in these test environments are required to validate the computational fluid dynamics (CFD) tools that are used to extrapolate wind-tunnel data toward realistic flight conditions and hardware. The development of fast instrumentation and measurement capabilities that can readily be integrated into the extreme conditions present under such test conditions is one of several major technological challenges associated with the design, building, and operation of these complex test environments. Among the host of physical quantities, accurate mapping of velocity flow fields remains a significant yet essential challenge in these facilities. In addition, spatially and temporally resolved measurements of other flow parameters, such as gas density, pressure, temperature, and species mixing fractions, are of paramount importance to characterize fully the fluid dynamics. Unfortunately, the widely available current suite of flow-field probes exhibit varying degrees of intrusiveness, requiring either the physical placement of probes inside the test facility or the introduction of foreign particles or gas-phase species into the flow field. Thus, the development and application of non-invasive flow-field diagnostic probe techniques is of principal importance in these environments. This proposal expands upon our successful Phase-I results and offers an integrated package of truly cutting-edge, multidimensional, seedless velocimetry and flow diagnostics for ground-test facilities. The concepts and ideas proposed range from proof-of-principle demonstration of novel methodologies using kHz-rate femtosecond (10-15 sec) and 100-kHz-rate burst-mode picosecond (10-12 s) duration laser sources to measurements in realistic tunnel conditions expected in the current solicitation.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

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Dates

Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_87662
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 143b3b1b-c408-45b0-87a2-9d76227c0374
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2018-03-01
Homepage URL https://techport.nasa.gov/view/87662
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 616362ca75ff41ccffc2c23606dcf45febdbed55
Source Schema Version 1.1

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