Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Transactions of the Institute of Fluid-Flow Machinery

1 2015

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: turbulence generation

Sortuj według:

Ogranicz wyniki do:

The decay power law in turbulence generated by grids

Grzelak J., Wierciński Z.

Transactions of the Institute of Fluid-Flow Machinery

2015

nr 130

93--107

It is well known that turbulence in the flow can be characterized by two main parameters: the intensity and scale (such as macro- or microscale of length, time or speed). Turbulence in wind tunnels can be generated by a variety of means (placed perpendicularly to the flow) like passive and active grids, most often grids of round or square wires, perforated plates and so on. The aim of this study is to gain a detailed knowledge of the degree of turbulence isotropy and homogeneity in the flow behind the grids of variable geometry. For this purpose, skewness and kurtosis of the velocity fluctuations and also transverse variation for five grids of different parameters were determined. Additionally, some new results on the influence of the initial conditions of turbulence generation on the decay law of turbulence are given.