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Drag Reduction Technology Of Laminar Jet
- Sep 30, 2017 -

Centralized heating and air conditioning system to become a large energy-consuming, including central heating, air conditioning system water distribution pipe network energy consumption occupies a large proportion. The central heating system pumps include circulating water pumps, relay pumps and replenishment pumps.Laminar Jet 

All of these pumps have a power consumption equivalent to 30.3% of the total heat supply. The air conditioning system pumps include chilled water pumps and cooling pumps, the majority of domestic Chilled water system due to the existence of a variety of design and operation problems, making the annual consumption of chilled water pump is often up to 30% of the annual electricity consumption, 40% or even 50%.Laminar Jet

In order to further reduce the heating and air conditioning water distribution system in the pump energy consumption, a deeper level of research work. Considering the energy consumption of the pump is to overcome the water in the hot (cold) source, transmission and distribution system and the user end of the flow resistance, then reduce the flow resistance can further achieve heating and air conditioning water distribution system energy saving purposes.Laminar Jet Therefore, it is of great significance to study the ideal drag reduction technology for heating and air conditioning water distribution system.On the drag reduction technology, there are ribs drag reduction, viscosity drag reduction (which includes the smooth wall drag reduction, polymer additives drag reduction and micro-bubble drag reduction, etc.), bionic drag reduction, wall vibration drag reduction. This paper focuses on the drag reduction mechanism and drag reduction method which can be used for the viscosity reduction of air supply and air conditioning system. Viscous drag reduction is to change the boundary conditions of a fluid boundary condition or change its boundary from outside or by changing the physical, chemical, mechanical properties of the boundary material or the injection of physical, chemical, mechanical properties of the gas in the near-wall region of the liquid, To change the near-wall fluid movement and dynamic properties, so as to achieve the purpose of reducing the resistance of the technology.Laminar Jet