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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >PRODUCTION OF DIFFUSION FLAMES IN THE NEAR EXTINCTION LIMIT REGIME USING A HELE-SHAW APPARATUS IN A SIMULATED LOW GRAVITY ENVIRONMENT
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PRODUCTION OF DIFFUSION FLAMES IN THE NEAR EXTINCTION LIMIT REGIME USING A HELE-SHAW APPARATUS IN A SIMULATED LOW GRAVITY ENVIRONMENT

机译：在模拟的低重力环境中使用Hello-Shaw装置在近乎极限极限区域内产生扩散火焰

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摘要

A Hele-Shaw apparatus that produced spreading diffusion flames in the near extinction limit was designed and constructed. A scaling analysis was used to determine the maximum test section height for which effects of gravity could be neglected. Preliminary results showed that this apparatus could be used to produce flame instabilities which resemble drop tower test results from NASA and other diffusion flame instability studies. Therefore, the Hele-Shaw apparatus is useful for studying flames in a simulated low gravity environment. Additional unstable behaviors seen in the device, such as flame pulsing and spreading blue cusps, not in the NASA testing further supported the need for investigations during longer microgravity times on the International Space Station. The initial testing was only used to gain an observable region of unstable flames. Further studies will be directed at explaining and quantifying specific behaviors with test conditions.
机译：设计并构造了在接近灭绝极限时产生扩散扩散火焰的Hele-Shaw设备。使用比例分析确定可以忽略重力影响的最大测试截面高度。初步结果表明，该装置可用于产生类似于美国宇航局和其他扩散火焰不稳定性研究的落塔测试结果的火焰不稳定性。因此，Hele-Shaw装置可用于研究模拟的低重力环境中的火焰。在设备中看到的其他不稳定行为，例如火焰脉动和蓝色尖瓣的扩散，而不是NASA测试中的行为，进一步支持了在国际空间站上进行更长的微重力时间研究的需要。初始测试仅用于获得可观察到的不稳定火焰区域。进一步的研究将针对在测试条件下解释和量化特定行为。

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