| 钱环宇,余永刚.2种低射速下火炮膛内模块装药烤燃特性的对比与分析[J].装备环境工程,2022,19(3):32-38. QIAN Huan-yu,YU yong-gang.Comparison and Analysis of Cook-Off Characteristics of Modular Charge in Gun Chamber at Two Low Firing Rates[J].Equipment Environmental Engineering,2022,19(3):32-38. |
| 2种低射速下火炮膛内模块装药烤燃特性的对比与分析 |
| Comparison and Analysis of Cook-Off Characteristics of Modular Charge in Gun Chamber at Two Low Firing Rates |
| 投稿时间：2021-12-29 修订日期：2022-01-19 |
| DOI：10.7643/issn.1672-9242.2022.03.005 |
| 中文关键词: 模块装药 烤燃 连续射击 火炮药室 壁面温度 |
| 英文关键词:modular charge cook-off continuous firing gun chamber wall temperature |
| 基金项目:国家自然科学基金(52076111) |
|
|
|
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 研究火炮多发连续射击后膛内模块装药的受热过程。方法 采用烤燃的思想建立模块装药留膛二维瞬态烤燃模型。以443 K为临界温度，求解火炮在2种低射速工况(以每分钟2、3发)下连续射击至药室内壁温度达到约443 K时的壁面温度分布，并以此为初始温度条件，对模块装药在膛内的烤燃过程进行数值模拟，对比分析2种低射速下火炮膛内模块装药的烤燃特性。结果 火炮以每分钟2发射击42发后，火炮药室内壁温度达到444.3 K，装填入内的模块装药在膛内滞留176.4 s后，发生烤燃响应，烤燃响应温度为484.2 K。射速为每分钟3发时，火炮射击39发后，药室内壁温度达到444.3 K，此时模块装药在膛内滞留216.9 s后会发生烤燃响应，烤燃响应温度为483.0 K。2种低射速工况下，模块装药的初始烤燃响应位置均位于模块盒右上角的内壁处。数值计算所得烤燃响应温度结果与试验一致。结论 该模型能够较好地分析模块装药在膛内的烤燃问题。射速对模块装药滞留膛内的烤燃特性有一定影响。 |
| 英文摘要: |
| To study the heating process of modular charge in gun chamber after multiple continuous firings, a two-dimensional transient cook-off model of modular charge retained in gun chamber was established with cook-off method. Taking 443 K as the critical temperature, the wall temperature distributions when the gun continuously fires until the temperature of the inner chamber wall reaches about 443 K are solved at two low firing rates of 2 rounds/min and 3 rounds/min, which are then adopted as the initial temperature. Based on that, the cook-off processes of modular charge in the chamber are numerically simulated to compare and discuss the cook-off characteristics of modular charge in gun chamber at two low firing rates. The results show that the temperature of the inner wall of the gun chamber reaches 444.3 K after 42 rounds at the firing rate of 2 rounds/min. The modular charge produces cook-off response after being retained in the chamber for 176.4 s with the cook-off response temperature of 484.2 K. When at 3 rounds/min, the inner wall temperature of the chamber reaches 444.3 K after 39 rounds, in which the modular charge produces cook-off response at 216.9 s with the temperature of 483.0 K. Under the two low firing rate conditions, the initial cook-off response positions of the modular charge are located in the upper right corner of the modular cartridge. The numerical results of cook-off off temperature are well consistent with the experimental results. The model is proved to be able to analyze the cook-off problem of modular charge in the chamber, and the firing rate has a certain influence on the cook-off characteristics of modular charge retained in gun chamber. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
