| Bag filter was taken as a large-scale dust removal equipment, which commonly used in coal, metallurgy, steel, electric power and other fields. With the increasingly serious environmental situation and the relevant regulatory gradually strengthen, bag filters market and the product user customization requirements increased. Problems of long experimental period, low efficiency, high cost and big risks are very obvious in the process of new product development of traditional methods which can’t satisfy development speed and quality requirements of large dust removal equipment.To solve these problems, a virtual simulation system based on virtual reality for bag filter pulse cleaning experiments was established by means of numerical simulation, virtual reality modeling, data-driven simulation technology, and interactive control and animation realization technology. Exploratory research work was carried out to solve the key problems on the simulation of pulse-jet cleaning experiment based on virtual reality. The research contents and results were as follows:(1)By studying the virtual reality simulation experiment technology, theoretical foundation and key technologies of virtual simulation system, the structure and architecture for virtual simulation system of bag filter cleaning experiment were specified. And the overall structure of software and hardware systems for simulation system was analyzed and designed.(2)The structure of pulse cleaning experiment device, cleaning performance, evaluation factors and mathematical model of simulation were analyzed. By means of computational fluid dynamics software Fluent, numerical simulations of the injection pipe area and the filter bag area were performed. The speed value of injection nozzle tube at different positions as well as the eigenvalues of pressure and velocity fields inside the bag were obtained, which lay a foundation for bag filter cleaning performance analysis and virtual experiments.(3)The key techniques of virtual reality simulation were studied. By means of virtual reality modeling language, the appearance, function and behavior of 3D virtual model for pulse cleaning experiment device were constructed, and the virtual display of device structure was realized. By using particle systems theory and data-driven simulation method, airflow injection cleaning was simulated and the process of pulse-jet cleaning experiment was reappeared, which enhanced the sense of presence of virtual simulation experiment.(4)In the environment of Visual C++, desktop virtual reality simulation system of the pulse cleaning experiment was developed. The hierarchy of the system was planned, and the function of each module and user interface were designed. Finally, virtual reality simulation for pulse cleaning experiment under certain conditions was initially realized.Research shows that applying virtual reality simulation technology to pulse cleaning experiment can partially substitute the difficult or time-consuming and costly physical experiments in reality. The virtual simulation experiment has a profound meaning in shortening the experiment cycle, reducing the cost, improving the efficiency of the experiment, and it also provides a convenient for operator training, product display and virtual presentations. |
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