Transceiver for measuring spatial correlations in turbulent flow

申请人的研究重点是了解湍流与液滴气化之间以及湍流与火焰之间的相互作用。虽然众所周知，湍流对于液体或气体燃料燃烧系统的性能都是理想的，但它的整体作用仍然没有得到很好的理解。为了更好地理解这些物理现象，必须充分了解和控制潜在的湍流，这是申请人的方法。激光多普勒风速测量仪（LDA）是表征湍流和湍流的理想设备，目前在申请人的研究实验室中可用。目前的LDA系统只能同时测量两个正交的流速分量，由此可以推导出流动湍流度的时间演化和剪切应力。换句话说，使用当前版本的LDA无法获得湍流空间演化。因此，本申请的目的是要求一台设备对现有的LDA进行升级，从而能够测量湍流空间相关性，从而确定湍流空间演变。这一升级对于加强申请人的研究能力至关重要，从而能够产生高质量的研究。在现有2D LDA的总成本方面，如果没有这种廉价的设备，申请人的研究将受到阻碍。

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.