时烽超, 王玺, 裴蓓,等.约束条件对管道内生物气/空气预混气爆炸特性影响研究[J].河南理工大学学报（自然科学版）,2026,45(3):115-122.

SHI F C, WANG X, PEI B,et al.Effects of confinement on explosion characteristics of biogas/air premixed gas in a duct[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(3):115-122.

约束条件对管道内生物气/空气预混气爆炸特性影响研究

时烽超1, 王玺1, 裴蓓1,2

1.河南理工大学 安全科学与工程学院，河南 焦作  454003；2.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作 454003

摘要:目的 为了给生物气的安全利用提供理论依据，深入探究约束条件对不同组分生物气爆炸特性的影响，明晰泄爆后火焰传播规律和压力演化机制，开展约束条件对管道内生物气/空气预混气爆炸特性影响研究。  方法 针对生物气储运中典型的大长径比管道场景，实验在自主搭建的大长径比管道装置中开展。该管道左端采用不同层数的PVC薄膜密封，右端保持封闭状态，通过调控约束端薄膜层数与生物气成分组成系统研究爆炸参数的变化规律。  结果 结果表明，PVC薄膜层数对预混气超压峰值的影响要远大于CH4体积分数的影响。随着约束端PVC薄膜层数从1层增至9层，预混气的压力波波形变化明显，逐渐由双峰型向单峰型过渡，3层薄膜为关键分界点。与CH4体积分数提高相比，增加薄膜层数可有效提高最大压力增长率。生物气中CH₄体积分数对火焰传播时间和前锋速度的影响占主导地位。薄膜层数固定时，最大火焰瞬时速度随CH₄体积分数增加呈线性上升，传播时间相应缩短。预混气爆炸过程中，火焰前锋速度、空间位置与压力波动的动态变化以及与火焰结构的湍流演化存在强耦合性。  结论 明确了约束强度与生物气组分对爆炸特性的调控规律，可为生物气储存运输设施的安全设计、泄爆装置优化及工程应用中的风险防控提供理论支撑与技术参考。

关键词:生物气;爆炸特性;郁金香火焰;约束条件;超压

doi:10.16186/j.cnki.1673-9787.2025060049

基金项目:国家自然科学基金资助项目（52474216）

收稿日期:2025/06/30

修回日期:2025/12/31

出版日期:2026/04/28

Effects of confinement on explosion characteristics of biogas/air premixed gas in a duct

Shi Fengchao1, Wang Xi1, Pei Bei1,2

1.School of Safety Science and Engineering， Henan Polytechnic University， Jiaozuo  454003， Henan， China；2.Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization， Jiaozuo  454003， Henan， China

Abstract: Objectives To provide a theoretical basis for the safe utilization of biogas， the effects of confinement conditions on the explosion characteristics of biogas with different compositions were systematically investigated， and the flame propagation behavior and pressure evolution mechanism after venting were clarified.  Methods Focusing on a typical long pipeline with a large length-to-diameter ratio in biogas storage and transportation， experiments were conducted using a self-developed apparatus. The left end of the pipeline was sealed with PVC films of different layers， while the right end was closed. By varying the number of film layers and the methane concentration， the variation of explosion parameters was systematically analyzed.  Results The results show that the number of PVC film layers has a significantly greater effect on the  peak overpressure than the methane volume fraction. As the number of layers increases from 1 to 9， the pressure waveform gradually transitions from bimodal to unimodal， with three layers identified as the critical threshold. Increasing the number of film layers is more effective in enhancing the maximum pressure rise rate than increasing the methane concentration. The methane volume fraction plays a dominant role in flame propagation time and flame front velocity. At a fixed number of film layers， the maximum instantaneous flame velocity increases linearly with methane concentration， while the propagation time decreases accordingly. During the explosion process， the dynamic evolution of flame front velocity， spatial position， and pressure is strongly coupled with the turbulent development of the flame structure.  Conclusions The results reveal the regulatory mechanisms of confinement strength and biogas composition on explosion characteristics， providing theoretical support and technical guidance for the safety design of biogas storage and transportation systems， optimization of venting devices，  and risk control in engineering applications.

Key words:biogas;explosion characteristic;tulip flame;confinement;overpressure