output rate up to 10–15 times of the turbine intake rate. Consequently,
it attains almost the same blow effect as the traditional
blade-fan with smaller power but avoids the “air-cutting” effect by
blades. Annular slot jets can be applied in various fields [1–3] involving
the transportation and combustion of solid phase particles
in chemical production, dust removal for solar panels and cooling
equipment in aluminum production line etc., due to its safety, stabilization
and energy saving. Therefore, the theoretical research on
the air multiplier has comprehensive application prospect in engineering
and industry. It is noticed that the plane jets, round and
rectangular jets have been studied frequently, while annular slot
jets have relatively rarely been reported. Thus the study on the air
multiplier cannot only achieve social and economic benefits, but also
improve fundamental theory of annular slot jets.