An Airtight Device Complicated Cavity Flow Field Characteristic Analysis And Optimization Of Structural Design

Ultra-large type complex housing is one kind of new gas check, it has the structurecharacteristic to be complex, the geometry size is big, single fuel gas input value big and soon characteristics. At the same time, does not have the success prior example nearly to theultra-large housing interior complex fuel gas flow field research. The paper using CFDsoftware Fluent to analysis the housing interior complex fuel gas flow field characteristicrely on the hydrodynamics, mainly has completed following several aspect work:1st, inspected the Fluent core algorithm and the rationale after the system, hasvoluntarily compiled the C language program module, carries on the re-development to theFLUENT software, has solved the boundary condition input value along with the timedynamic change parametric problem and the grid level depend on stress situation realizationdynamic renewal question, completed the ultra-large complex housing interior entirenavigation body to be real the tube process.2nd, through the similarity theory method to theoretical analysis the housing interiorcomplex phenomenon, had determined1/4shrinks model navigation body leaves in the tubeprocess the similar accurate number choices principle, obtained shrunk model similaraccurate number, through the solution computation, obtained shrunk model and thefull-scale model different input source parameter ratio ruler, obtained shrinks model thesource input parameter, for shrank launch test provides the instruction.3rd, because the ultra-large complex housing does not belong to the symmetricalstructure, the housing flow field region is extremely irregular, the structure size suddenchange span is big, with difficulty realizes the entire housing computation territory griddivision by using the traditional grid division method, this article uses the piecemeal gridand the mix grid production method, carries on special handling to the housing computation,simultaneously carries on the density control to the housing grid, completes the complexhousing the three dimensional flow field calculation territory grid division, the computedresult indicated, the computation astringency is good, the computation precision was high,has guaranteed in the long calculation process feasibility.4th, this article utilized the hydrodynamics method to establish non fixed conditionsviscous, compressible, three-dimensional complex cavity supersonic speed owed theinflation fuel gas jet flow the mathematical model, the utilization moves the grid technology, to study the body of internal flow field in cylinder flow numerical simulation, could seefrom the computed result the spatial complex shock pattern shape and the navigation bodyleft in the tube process various parameters dynamic development change tendency. Throughthe housing system in the different time flow field distribution, reappears has therepresentative flow field phenomenon, and has obtained the main flowing parameter alongwith the time variation rule.5th, on the seal packing collar opened the hole geometry design parameter to thehousing in to carry on the optimized analysis, proposed take initial opened the hole plan totwo to develop as the foundation approaches the type separate optimization plan, namelythrough to opened under the hole plan differently the data analysis and the flow field law ofmotion contrast, obtained the superior seal packing collar to open the hole parameter.Utilizes the different modeling method and the grid division method, has completed manydifferent complex housing fluid territory model modeling and the grid divides, reducedgreatly the computation period.6th, because has considered the optimization plan versatility, therefore this articleproposed the improvement program has the universal reference to the concentric tube seriesdesign.