Transceiver for measuring spatial correlations in turbulent flow

用于测量湍流空间相关性的收发器

• 批准号: 358953-2008
• 负责人: Birouk, Madjid
• 金额: $ 1.94万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364533
• 关键词: Transceiver; measuring; spatial; correlations; turbulent

The applicant research is focused on understanding the interaction between turbulence and droplets gasification, as well as between turbulence and flames. Although, it is well known that turbulence is desirable for the performance of either liquid- or gaseous fueled combustion system, its overall role is still not well understood. In order to better understand these physical phenomena, it is essential to acquire full knowledge and control of the underlying turbulence, which is the applicant's approach.A laser Doppler anemometry (LDA), which is ideal for characterizing turbulence and turbulent flows, is currently available in the applicant's research laboratory. This LDA system, in its current configuration, is capable only of measuring simultaneously the flow two-orthogonal velocity components, from which the flow turbulence temporal evolution and shear stresses can then be deduced. In other words, turbulence spatial evolution cannot be acquired by using this LDA in its current version. Therefore, the purpose of this application is to request a piece of equipment to upgrade the existing LDA, and hence enable the measurement of the turbulence spatial correlations from which the turbulence spatial evolution can be determined.This upgrade is essential for strengthening the applicant's research capabilities, and thus enables producing high-quality research. Without this inexpensive equipment in with respect to the total cost of the exiting 2D LDA, the applicant's research would be hindered.

应用研究的重点是了解湍流和液滴气化之间的相互作用，以及湍流和火焰之间的相互作用。虽然众所周知，湍流对液体或气体燃料燃烧系统的性能是可取的，但其总体作用仍未被很好地了解。为了更好地理解这些物理现象，必须充分了解和控制基本的湍流，这是申请人的方法。激光多普勒风速仪(LDA)是表征湍流和湍流的理想仪器，目前在申请人的研究实验室中可用。该LDA系统在目前的结构下，只能同时测量两个相互垂直的流速分量，由此可以推断出水流湍流的时间演化和剪应力。换句话说，在目前的版本中，不能使用该LDA获取湍流空间演化。因此，这项申请的目的是请求一台设备来升级现有的LDA，从而能够测量湍流的空间相关性，从而可以确定湍流的空间演变。这一升级对于加强申请者的研究能力至关重要，从而能够产生高质量的研究。如果没有这种廉价的设备，申请人的研究将受到阻碍，因为现有的二维LDA的总成本。