Numerical analysis of fluid flow through axial fan with sickle blades

U ovom radu numerički je analizirano strujanje zraka kroz aksijalni ventilator sa srpastim lopaticama. Za vrednovanje rada ventilatora potrebno je poznavati strujanje fluida kroz njega. Eksperimentalna analiza strujanja fluida izuzetno je skupa i zahtjevna te se razvojem računala sve više prednosti daje numeričkoj analizi. Nažalost, numerička analiza je još uvijek u razvoju te zahtijeva eksperimentalnu validaciju. CAD model ventilatora dobiven je od proizvođača koji je obrađen u CAD programu Catia® i pripremljen za izradu površinske mreže. Površinska mreža izrađena je u programu Pointwise®, volumenska u programu TGrid® a simulacije i obrada podataka u programu Fluent®. Usporedena su četiri modela turbulencije koja su implementirana u programu Fluent®: - standardni k-ϵ model - RNG k-ϵ model - realisable k-ϵ model - k-ω sst model Najvjerodostojnijim modelom turbulencije, kojim se pokazao k-ω sst model, izračunata je radna karakteristika ventilatora.In this thesis air fow through the axial fan with sickle blades was numerically analysed. For the evaluation of the fan it is necessary to know the fow of fuid through it. Experimental analysis of fuid flow is extremely costly and demanding, and with the development of computers the advantage is given to numerical analysis. Unfortunately, numerical analysis is still under development and requires experimental validation. CAD model of the fan was provided by the producer and it was processed in CAD software Catia and prepared for surface meshing. Surface mesh was made in meshing software Pointwise and, simulations and post processing was done in Fluent. Four turbulence models, that are implemented in Fluent, were validated: - standard k-ϵ model - RNG k-ϵ model - realisable k-ϵ model - k-ω sst model Most credible turbulence model, which was k-ω sst model, was used to calculate working characteristics of the fan