| Flow instability of supercritical hydrocarbon fuel in a multi-channel cooling system | |
Jin YC(靳一超)1,2 ; Wu K(吴坤)2; Fan XJ(范学军)2,3
| |
| Corresponding Author | Fan, Xuejun([email protected]) |
| Source Publication | CHINESE JOURNAL OF AERONAUTICS
 |
| 2024-02-01 | |
| Volume | 37Issue:2Pages:283-295 |
| ISSN | 1000-9361 |
| Abstract | Thermally -induced flow instabilities are a critical issue in multi -channel regenerative cooling systems. In particular, the interactions between Density -Wave Oscillations (DWO) and Flow Maldistribution (FMD) can result in complex and disastrous instability phenomena. This study investigates the instability behaviors of hydrocarbon fluid in a four -channel system with a constant heat flux ratio using both frequency- and time -domain methods. As the heat flux increases, the in -tube flow sequentially destabilizes in each channel and converges to new equilibrium states, leading to the emergence of FMD phenomena. This also causes the system eigenvalue to change repeatedly from negative to positive rather than increasing monotonically. Additionally, the system eigenvalues are between those of the two most unstable channels, indicating that the stability behavior of the entire system is dictated by the most unstable channel. After FMD occurs, flow oscillations are activated in channels with weak stability, and the in -tube flow is observed to evolve into various flow patterns, including stable flow, self -sustained oscillation, oscillation divergence, quasiperiodic oscillation, and oscillation excursion. The novel instability mode of oscillation excursion involves a spontaneous transition of operating states. It oscillates from an equilibrium state and then stabilizes at a new operational state after oscillation -induced redistribution. However, the newfound stable state may also be only temporary, with the in -tube flow regressing to the initial state, resulting in quasi -periodic oscillation. (c) 2023 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. This is an open access article under the CC BY -NC -ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| Keyword | Cooling Supercritical fluids Hydrocarbons Flow instability Flow maldistribution Density -wave oscillations |
| DOI | 10.1016/j.cja.2023.09.027 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:001169170900001 |
| WOS Keyword | 2-PHASE FLOW ; STABILITY ANALYSIS ; PARALLEL CHANNELS ; DYNAMIC-ANALYSIS ; HEATED CHANNEL ; MODEL ; WATER ; TUBE |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Aerospace |
| Funding Project | National Key Project, China[GJXM92579] ; Strategic Priority Research Pro- gram of Chinese Academy of Sciences, China[XDA17030100] |
| Funding Organization | National Key Project, China ; Strategic Priority Research Pro- gram of Chinese Academy of Sciences, China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Fan, Xuejun |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94626 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Jin YC,Wu K,Fan XJ. Flow instability of supercritical hydrocarbon fuel in a multi-channel cooling system[J]. CHINESE JOURNAL OF AERONAUTICS,2024,37,2,:283-295.Rp_Au:Fan, Xuejun |
| APA | 靳一超,吴坤,&范学军.(2024).Flow instability of supercritical hydrocarbon fuel in a multi-channel cooling system.CHINESE JOURNAL OF AERONAUTICS,37(2),283-295. |
| MLA | 靳一超,et al."Flow instability of supercritical hydrocarbon fuel in a multi-channel cooling system".CHINESE JOURNAL OF AERONAUTICS 37.2(2024):283-295. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment