NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 1 of 11343
Fast laser-induced aerosol formation for visualization of gas flows
External Online Source: doi:10.1063/1.1138286
Author and Affiliation:
Hassa, C.(Stanford Univ., CA, United States)
Hanson, R. K.(Stanford University, Stanford, CA, United States)
Abstract: A technique for aerosol seeding of gas flows by laser-induced particle formation is demonstrated using a pulsed Nd:YAG laser (1.06 microns) for optical breakdown of a mixture of SF6 and H2 in an inert carrier gas. It is noted that, contrary to the smoke-wire approach, the laser-induced particles form first in zones of high turbulence, since mixing enhances coagulation. The method also allows seeding to be performed in locations hardly accessible otherwise and is mechanically nonintrusive. Finally, a study of the mixture and the breakdown effects indicates that for H2:SF6 ratios between 3:1 and 15:1 the particle formation is only limited by the physics of the gas/particle conversion.
Publication Date: Apr 01, 1985
Document ID:
19850048962
(Acquired Nov 28, 1995)
Accession Number: 85A31113
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Journal Article
Publication Information: Review of Scientific Instruments (ISSN 0034-6748); 56; 557-559
Publisher Information: United States
Contract/Grant/Task Num: F49620-83-K-0004; NAG3-285
Financial Sponsor: NASA; United States
Organization Source: Stanford Univ.; CA, United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: AEROSOLS; FLOW VISUALIZATION; GAS FLOW; LASER APPLICATIONS; MIE SCATTERING; RADIATION CHEMISTRY; COAGULATION; HYDROGEN; PHOTODISSOCIATION; PULSED LASERS; SULFUR FLUORIDES
Imprint And Other Notes: Review of Scientific Instruments (ISSN 0034-6748), vol. 56, April 1985, p. 557-559.
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 18, 2011
Contact Us