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http://hdl.handle.net/10397/95591
Title: | Hypergolic ignition modulated by head-on collision, intermixing and convective cooling of binary droplets with varying sizes | Authors: | Zhang, D Yu, D Zhang, P Yuan, Y Yue, L Zhang, T Fan, X |
Issue Date: | Aug-2019 | Source: | International journal of heat and mass transfer, Aug. 2019, v. 139, p. 475-481 | Abstract: | The hypergolic ignition induced by the head-on collision of TMEDA and WFNA droplets was experimentally investigated with emphasis on the effect of droplet size on the ignitibility and the ignition delay time. The ignitibility regime nomogram in We-dO space indicates that the reduction of droplet size tends to suppress the hypergolic ignition. The ignition delay time, which was precisely determined by using grayscale level analysis, becomes shorter for smaller droplets. The seemingly conflicting size effects were resolved by means of time scaling analysis to reveal the size dependence of the three pre-ignition processes, which were identified as the first stage of droplet collision, deformation and intermixing, the second stage of droplet heating from interior to surface, and the third stage of droplet vaporization subject to heat loss by convective cooling. | Publisher: | Pergamon Press | Journal: | International journal of heat and mass transfer | ISSN: | 0017-9310 | EISSN: | 1879-2189 | DOI: | 10.1016/j.ijheatmasstransfer.2019.05.040 | Rights: | © 2019 Elsevier Ltd. All rights reserved. © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Zhang, D., Yu, D., Zhang, P., Yuan, Y., Yue, L., Zhang, T., & Fan, X. (2019). Hypergolic ignition modulated by head-on collision, intermixing and convective cooling of binary droplets with varying sizes. International Journal of Heat and Mass Transfer, 139, 475-481 is available at https://doi.org/10.1016/j.ijheatmasstransfer.2019.05.040 |
Appears in Collections: | Journal/Magazine Article |
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Zhang_Hypergolic_Ignition_Modulated.pdf | Pre-Published version | 2.27 MB | Adobe PDF | View/Open |
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