MODELLING OF GAS STREAMS TAKING ACCOUNT OF VISCOSITY

摘要

It is shown that in some cases in studying the interaction of a technical device with a gas stream among similarity criteria it is possible to introduce a dimensionless value as the ratio of a new dimensional complex (the product of dynamic viscosity and kinematic viscosity having a dimension of force) into the reaction force of a mechanical device under a hydrogas-dynamic influence. Then the choice of "model gases " and their ranking is facilitated; it is also possible to vary the gas stream by changes in pressure and temperature making it possible to embrace the field of corrosive and toxic gas operation. The method may be extended to liquid streams.