SBIR Phase I: Electro-Mechanical Micro-Vibratory Transducers for Convective Heat Transfer Enhancement

SBIR 第一阶段：用于增强对流换热的机电微振动换能器

• 批准号: 0060786
• 负责人: Sumon Sinha
• 金额: $ 10万
• 依托单位: SINHATECH
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2001-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0060786&HistoricalAwards=false
• 关键词: SBIR; Phase; Electro; Mechanical; Micro

This Small Business Innovation Research (SBIR) Phase I project is focused on developing a method to adapt the use of a novel electro-mechanical micro-vibratory transducer to enhance convective heat transfer rates in heat exchangers while minimizing any added flow pressure drop. The transducer is composed of a very thin, light weight composite sheet that contains the combination sensors and vibratory actuators that are used to detect boundary layer flow conditions and to excite the viscous wall layer to control boundary layer transition and separation. The innovative approach uses localized sub-micron level wall vibrations to increase the wall skin friction while attenuating the overall turbulence level in the flow. This is expected to lower the flow pressure drop increase compared to traditional forms of heat transfer enhancement through turbulence enhancement. The power consumption of the transducer is also about three orders of magnitude smaller than the best competing active flow control devices and is expected to be insignificant in comparison to the heat transfer rates. The transducer can be easily integrated to plates, fins or tubes on the airside of a heat exchanger.The commercial viability is that it can improve waste heat recovery and utilization for manufacturing and processes industries involving gaseous phase drying. It can also make stationary and vehicle mounted heating ventilating and air-conditioning (HVAC) and power generation systems more compact and efficient. It can allow denser packaging of electronic components by facilitating heat dissipation in a smaller space.

这个小型企业创新研究（SBIR）第一阶段项目的重点是开发一种方法，以适应使用一种新型的机电微振动传感器，以提高热交换器中的对流传热率，同时最大限度地减少任何增加的流动压降。 该传感器由一个非常薄、重量轻的复合板组成，该复合板包含传感器和振动致动器的组合，用于检测边界层流动条件并激励粘性壁层以控制边界层过渡和分离。 该创新方法使用局部亚微米级壁振动来增加壁表面摩擦，同时衰减流中的总体湍流水平。 与通过湍流增强的传统形式的传热增强相比，预期这将降低流动压降增加。 换能器的功耗也比最佳竞争的主动流量控制装置小大约三个数量级，并且与传热速率相比预计是微不足道的。 该传感器可以很容易地集成到热交换器空气侧的板、翅片或管道上。商业可行性在于，它可以提高涉及气相干燥的制造和加工行业的废热回收和利用。它还可以使固定和车载暖通空调（HVAC）和发电系统更加紧凑和高效。 它可以通过促进在较小空间中的散热来允许电子部件的更密集封装。