skip to main content

DOE PAGESDOE PAGES

Title: Strategies for obtaining long constant-pressure test times in shock tubes

Several techniques have been developed for obtaining long, constant-pressure test times in reflected shock wave experiments in a shock tube, including the use of driver inserts, driver gas tailoring, helium gas diaphragm interfaces, driver extensions, and staged driver gas filling. Here, we detail these techniques, including discussion on the most recent strategy, staged driver gas filling. Experiments indicate that this staged filling strategy increases available test time by roughly 20 % relative to single-stage filling of tailored driver gas mixtures, while simultaneously reducing the helium required per shock by up to 85 %. This filling scheme involves firstly mixing a tailored helium–nitrogen mixture in the driver section as in conventional driver filling and, secondly, backfilling a low-speed-of-sound gas such as nitrogen or carbon dioxide from a port close to the end cap of the driver section. Using this staged driver gas filling, in addition to the other techniques listed above, post-reflected shock test times of up to 0.102 s (102 ms) at 524 K and 1.6 atm have been obtained. Spectroscopically based temperature measurements in non-reactive mixtures have confirmed that temperature and pressure conditions remain constant throughout the length of these long test duration trials. Finally, these strategies have beenmore » used to measure low-temperature n-heptane ignition delay times.« less
Authors:
ORCiD logo [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Combustion Research Facility
  2. Stanford Univ., CA (United States). Dept. of Mechanical Engineering
Publication Date:
Report Number(s):
SAND2016-12714J
Journal ID: ISSN 0938-1287; 649988
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Shock Waves
Additional Journal Information:
Journal Volume: 25; Journal Issue: 6; Journal ID: ISSN 0938-1287
Publisher:
Springer
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1338397

Campbell, Matthew Frederick, Parise, T., Tulgestke, A. M., Spearrin, R. M., Davidson, D. F., and Hanson, R. K.. Strategies for obtaining long constant-pressure test times in shock tubes. United States: N. p., Web. doi:10.1007/s00193-015-0596-x.
Campbell, Matthew Frederick, Parise, T., Tulgestke, A. M., Spearrin, R. M., Davidson, D. F., & Hanson, R. K.. Strategies for obtaining long constant-pressure test times in shock tubes. United States. doi:10.1007/s00193-015-0596-x.
Campbell, Matthew Frederick, Parise, T., Tulgestke, A. M., Spearrin, R. M., Davidson, D. F., and Hanson, R. K.. 2015. "Strategies for obtaining long constant-pressure test times in shock tubes". United States. doi:10.1007/s00193-015-0596-x. https://www.osti.gov/servlets/purl/1338397.
@article{osti_1338397,
title = {Strategies for obtaining long constant-pressure test times in shock tubes},
author = {Campbell, Matthew Frederick and Parise, T. and Tulgestke, A. M. and Spearrin, R. M. and Davidson, D. F. and Hanson, R. K.},
abstractNote = {Several techniques have been developed for obtaining long, constant-pressure test times in reflected shock wave experiments in a shock tube, including the use of driver inserts, driver gas tailoring, helium gas diaphragm interfaces, driver extensions, and staged driver gas filling. Here, we detail these techniques, including discussion on the most recent strategy, staged driver gas filling. Experiments indicate that this staged filling strategy increases available test time by roughly 20 % relative to single-stage filling of tailored driver gas mixtures, while simultaneously reducing the helium required per shock by up to 85 %. This filling scheme involves firstly mixing a tailored helium–nitrogen mixture in the driver section as in conventional driver filling and, secondly, backfilling a low-speed-of-sound gas such as nitrogen or carbon dioxide from a port close to the end cap of the driver section. Using this staged driver gas filling, in addition to the other techniques listed above, post-reflected shock test times of up to 0.102 s (102 ms) at 524 K and 1.6 atm have been obtained. Spectroscopically based temperature measurements in non-reactive mixtures have confirmed that temperature and pressure conditions remain constant throughout the length of these long test duration trials. Finally, these strategies have been used to measure low-temperature n-heptane ignition delay times.},
doi = {10.1007/s00193-015-0596-x},
journal = {Shock Waves},
number = 6,
volume = 25,
place = {United States},
year = {2015},
month = {9}
}