THE EXPERIMENTAL AND NUMERICAL ANALYSIS OF TURBULENT FLOW PRESSURE DROP OF HELICAL SQUARE DUCT

In this study, the pressure drop of helical square duct which has 8x8 mm dimension, a pitch of b =12 mm was investigated both experimentally and numerically with the similar experimental boundary conditions. SIMPLE algorithm, PRESTO pressure-velocity interpolation option, RNG k-? turbulent model and Gauss Siedel iteration method were used in numerical computations which were done by FLUENT® programme. As a result it was understood that the maximum difference between numerical and experimental data is about 5 %. The experimental and numerical results were compared and validated with the results in the literature.

KARE KESÝTLÝ HELÝSEL KANALDA TÜRBÜLANSLI AKIÞTA BASINÇ DÜÞÜÞÜNÜN DENEYSEL VE NÜMERÝK ANALÝZÝ

Bu çalýþmada 8 x 8 mm kare kesitli, 12 mm hatveli helisel kanalda basýnç düþüþü deneysel olarak tespit edilerek benzer sýnýr þartlarýnda bilgisayarda nümerik çözüm yapýlmýþtýr. Nümerik çözüm FLUENT ® programý ile SIMPLE çözüm algoritmasý, PRESTO basýnç-hýz enterpolasyon yöntemi, RNG k-? türbülans modeli ve Gauss Siedel iterasyon metodu kullanýlarak yapýlmýþtýr. Nümerik ve deneysel veriler arasýnda en fazla % 5 gibi bir fark vardýr. Deneysel ve nümerik sonuçlar literatürde yayýnlanmýþ çözümler ile karþýlaþtýrýlarak valide edilmiþtir.