相关实验视频
Updated: Jan 13, 2026

09:27
Wind Tunnel Experiments to Study Chaparral Crown Fires
Published on: November 14, 2017
10.1K
研究类似性测试设计和在环境风条件下对坦克火灾的特性验证
Yi Jiang1, Fang Shen1, Zhuo Su1
1Hunan Safety Production Scientific Research Co., LTD., Changsha, China.
PloS one
|January 9, 2026
概括
这项研究调查了油箱火灾,发现风速对火焰特征的影响. 研究人员确定在此类事件中,人员的最低安全距离为21米.
科学领域:
- 消防安全工程 消防安全工程
- 燃烧科学 燃烧科学
- 风险评估 风险评估
背景情况:
- 石油储存对于可持续发展至关重要,但油箱火灾带来了重大的环境和安全风险.
- 了解油火灾的复杂动态对于有效的安全协议至关重要.
- 以前的研究还没有完全阐明大规模储中环境因素和火灾行为之间的关系.
研究的目的:
- 为了研究大规模储油箱火灾的火焰特性,热物理性质和安全距离-时间关系.
- 建立可靠的实验和模拟方法来研究坦克的消防安全.
- 为加强石油储存设施的安全措施提供关键数据.
主要方法:
- 使用相似性标准来设计和进行关于油火灾的小规模实验.
- 采用数值模拟来验证小规模实验的结果与全局场景的结果.
- 在不同风速下分析了火焰特性,包括高度,表面积,体积和温度.
- 确定了热释放率,并为人员建立了"安全距离-时间"关系.
主要成果:
- 风速对火焰高度的影响随着速度的增加而减少,最佳实验范围为0.97 m/s至6.64 m/s.
- 火焰表面积和体积与风速有非单调的关系,显示它们之间的线性相关性.
- 火焰温度随风速而波动,火焰体积与热释放率之间存在直接的线性关系.
- 与验证实验相比,数值模拟实现了高可靠性,温度和热释放率误差低于5%.
结论:
- 通过数值模拟验证的相似性标准实验,为研究油火灾提供了一种可靠的方法.
- 风速显著影响着火焰的特性,需要在安全规划中仔细考虑.
- 在研究的工程条件下,为人员建立了21米的最低安全距离,这对于应急响应计划至关重要.
相关概念视频
Modeling and Similitude
604
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
604
Typical Model Studies
615
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
615
Correlation of Experimental Data
472
Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
472
Design Example: Calculating Safe Diameter for Wind-Exposed Disc
351
Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
351
General External Flow Characteristics
517
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
517
Flame Photometry: Overview
1.4K
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
1.4K

