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| 复合材料缠绕高压气瓶火烧爆裂阈值及泄压研究 |
| Study on the Fire-Induced Burst Threshold and Venting Behavior of Filament-Wound Composite High-Pressure Vessels |
| 投稿时间：2026-01-04 修订日期：2026-02-28 |
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| 基金项目:, |
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| 中文关键词: 高压气瓶 火烧 爆裂阈值 流固耦合 泄压特性 |
| 英文关键词:High-pressure gas cylinder Fire condition Burst threshold Fluid-structure interaction Depressurization characteristics |
| 摘要点击次数: 189 |
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| 中文摘要: |
| 火烧条件下,高压气瓶在温度升高和内部压力上升的共同影响下容易发生爆裂,并伴随高速泄压和压力波扩散,对周围环境造成潜在危害。为研究火烧条件下气瓶的爆裂泄压特性,建立了由火烧流场计算、准瞬态热力响应分析、爆裂临界判定和爆裂后流固耦合模拟组成的多阶段分析流程。采用二分法确定了爆裂临界条件,随后采用流固耦合方法模拟了高压气瓶爆裂泄压过程,预测破口形成后的高速喷射过程和压力波传播规律。结果表明,爆裂由高温弱化区域率先发生,内部压力在破裂后约0.5 ms 内迅速衰减,并产生指向性明显的高速射流。50 cm 处超压峰值的模拟值为149.52 kPa,与试验测得的139.15 kPa 接近,验证了模型的有效性。研究结果可为高压气瓶火灾安全评估和防护设计提供技术支撑。 |
| 英文摘要: |
| Under fire conditions, high-pressure gas cylinders are prone to burst due to the combined effects of temperature rise and internal pressure increase, accompanied by high-speed depressurization and pressure-wave propagation, which may pose potential hazards to the surrounding environment. To investigate the burst and depressurization characteristics of gas cylinders exposed to fire, a multi-stage analysis framework was developed, consisting of fire-induced flow-field calculation, quasi-steady thermo-mechanical response analysis, burst threshold determination, and post-burst fluid-structure coupling simulation. The burst critical condition was identified using the bisection method, after which a coupled fluid-structure model was employed to simulate the depressurization process, predicting the formation of the rupture opening, the ensuing high-speed jet, and the propagation of pressure waves. The results indicate that burst initiates in the high-temperature weakened region, and the internal pressure rapidly drops within approximately 0.5 ms after rupture, accompanied by a strongly directional high-speed jet. The simulated overpressure peak at 50 cm from the cylinder wall is 149.52 kPa, which is close to the experimental value of 139.15 kPa, demonstrating the validity of the model. These findings provide technical support for fire safety assessment and protective design of high-pressure gas cylinders. |
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