Research On Texture Visualization Method Of Aircraft Surface Data Field

Dynamic texture visualization of the flow field data of the aircraft surface is to turnthe simulation results data of the aircraft surface flow field into the dynamic textureforms and display it. The dynamic texture visualization method allows designersintuitive observe the global Aircraft surface flow field information and variation ofaircraft surface flow field, enhance understanding and judgment on the phenomena ofaircraft surface flow, provide important basis to aircraft design optimization. It haslarger significance of the study and a good prospect.This paper further studies the flow field characteristics of the aircraft surface andtexture visualization methods of the vector field data. According to advantages andshortcomings of the existing Line Integral Convolution and Semi-Lagrangianadvection texture visualization methods, this paper put forwards a new method based onfusion of the two methods. Based on the optimization algorithm, this paper designedand implemented a GPU-based dynamic texture visualization prototype software for theaircraft surface flow field. The contributions and relevant work in this paper are asfollows:1). Considering the high computational complexity of the Existing Line IntegralConvolution (LIC) texture generation algorithm, this paper put forwards anOptimization algorithm based on fast particle tracking LIC texture generation.Firstly, the algorithm normalize the speed of flow field;Secondly, to trace particlewith one order euler method with the fixed integral steplength. The results showthat, compared with the LIC texture generation algorithm using high order Eulermethod, the optimization algorithm under the premise of the low-order Eulermethod to achieve quite good visual effects. Both computational complexity of theparticle tracking and texture quality are taken into account.2). To solve the blur problem of the semi-Lagrangian advection texture result image,this paper put forwards a Semi-Lagrangian advection dynamic texture generationmethod based on LIC texture. The method use the texture picture generated by theLine Integral Convolution method on the flow field as the advection backgroundnoise, for the image mix, changing the practice of the original semi-Lagrangianadvection algorithm using the random noise as the background noise.3). To solve the problem of the enhanced processing of aircraft surface texturevisualization of the flow field pertinence, loss flow field information representedby texture, this paper put forwards an aircraft surface flow field texturevisualization processing method based the threshold template. The method projectsthe three-dimensional scene onto the viewing plane, and then obtained theprojection area according to the aircraft coordinate of aircraft surface. Projection area is used as pass region of the threshold template, and the texture is enhancedonly in the pass region of the template threshold. The experimental results indicatethat the threshold template to ensure the texture enhancement only in the surface,ignoring the effect of the object scene and the texture representative of the flowfield of information is more accurate.4). With the comprehensive use of the research, this paper design and realize andynamic texture visualization prototype software for aircraft surface flow field.The software programming with GPU acceleration takes full account of thecharacteristics of dynamic texture and provides a complete interactive visualizationcapability. The experimental results show that the dynamic texture visualizationsoftware, high efficiency, good quality, verifying the correctness of theabove-mentioned research and effectiveness. The software is a practical dynamictexture visualization tool prototype for the aircraft surface flow field, and easy toexpand.