近日西華大學(xué)在《Aerospace》發(fā)表文獻(xiàn)《Experimental Investigation of the Effect of Bio-Inspired Wavy Leading-Edges on Aerodynamic Performance and Flow Topologies of the Airfoil》，文獻(xiàn)中使用了LUYOR-3121大面積輻照紫外燈用于仿生動(dòng)力學(xué)研究。LUYOR-3121大面積輻照紫外燈是一款內(nèi)置了21顆365nm 大功率紫外線led紫外燈，照射面積大，紫外線輻照強(qiáng)度高，先后被國(guó)內(nèi)外多家科研院所用于太陽(yáng)能、半導(dǎo)體、航空航天等行業(yè)的科學(xué)研究。

文獻(xiàn)摘要如下：

The characteristic of delayed airfoil stalls caused by the bio-inspired Wavy Leading-Edges (WLEs) has attracted extensive attention. This paper investigated the effect of WLEs on the aerodynamic performance and flow topologies of the airfoil through wind tunnel experiments, while also discussing the flow control mechanism of WLEs. The result shows that, at small Angle of Attack (AOA), the flow through the WLEs exhibits periodic and symmetrical characteristics, where flow vortices upwash at the trough and downwash at the crest, resulting in flow from the crest to the trough. Upwash leads to the formation of a localized three-dimensional laminar separation bubble (LSB) structure at the leading edge of the trough section. At large AOA after baseline airfoil stall, the flow on the airfoil surface of WLEs presents a two-period pattern along the spanwise direction, and the separation zone and the attachment zone appear alternately, indicating that the control effect of delayed stall is accomplished by reducing the separation zone on the airfoil surface. The alternating occurrence of the separation and attachment zones is the result of intricate interactions among flows passing through multiple WLEs. This interaction causes the convergence of high-momentum attached airflows on both sides, thereby constraining the spread of the separation from the leading edge and enabling the re-attachment of separated air. The research results of this paper provide a reference for researchers to reveal the flow control mechanism of WLEs more comprehensively.

Figure 7 shows the fluorescent oil film measuring device in the experiment. The fluorescent oil film was made of fluorescent powder with Dow Corning PMX-200 (Dow, Midland, Michigan, USA) silicone oil (viscosity is 100 cs and 350 cs). The UV excitation light source was a LUYOR-3121 UV lamp (LUYOR, Joliet, IL, USA). In this study, the Fastcam AX-100 mini (Photron, Tokyo, Japan)was used as a high-speed camera with a resolution of 1024 × 1024 pixels2. The Nikon lens had a focal length range of 14–24 mm. The camera shoots at 50 Hz. Usually, the optical flow algorithm can get a surface optical flow snapshot solution by processing the front and back images. This study averages 50–200 snapshots to obtain a stable and uniform flow topology.

文獻(xiàn)地址：https://doi.org/10.3390/aerospace11030194 

LUYOR-3121產(chǎn)品介紹：

吊掛式LED紫外線熒光探傷燈LUYOR-3121

上海路陽(yáng)儀器有限公司生產(chǎn)銷售各種紫外光源，有手持式紫外燈、臺(tái)式紫外燈、吊掛式紫外燈，有185nm，254nm，302nm、365nm和395nm等各種波段，能夠滿足科研院所各種實(shí)驗(yàn)要求，公司面對(duì)科研院所提供樣機(jī)免費(fèi)試用，也能夠按照實(shí)驗(yàn)需求提供定制服務(wù)。