Where does an air damper cause less resistance in a supply duct?

In summary, "Air Δ P on a resistance" refers to the change in air pressure caused by air flowing through a resistance. This change is typically measured using a pressure gauge or manometer and can be affected by factors such as air flow, resistance size and shape, and air properties. Understanding this concept is important in scientific research, particularly in fluid dynamics and aerodynamics, as it can help improve the efficiency and performance of various systems and equipment. To reduce "Air Δ P on a resistance," one can adjust the size and shape of the resistance or use additional mechanisms such as diffusers or flow straighteners.
  • #1
Yuri B.
137
0
Where in an air supply duct (after the fan) an air damper (or any other resistance to flow) will have less Δ P : closer to the fan, or closer to the outlet ?
 
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  • #2
For any given flow rate and restriction in a flow stream, the irreversible drop in pressure across that restriction will be lowest where density is highest.
 
  • #3
Thank you very much !
(all is clear now).
 
  • #4
One little qwestion more please. For the known volume (for the known dP) to find the mass flow, what pressure (and RH) do we take : one of before the restriction, after, or a mean ?
 

What is "Air Δ P on a resistance"?

"Air Δ P on a resistance" refers to the change in air pressure that occurs when air flows through a resistance, such as a valve or narrow opening. This change in air pressure can impact the performance of various systems and equipment.

How is "Air Δ P on a resistance" measured?

The change in air pressure on a resistance is typically measured using a pressure gauge or manometer. This device measures the difference in pressure between two points, allowing for the calculation of "Air Δ P" on a resistance.

What factors affect "Air Δ P on a resistance"?

The amount of air flow, the size and shape of the resistance, and the properties of the air (such as density and viscosity) can all impact "Air Δ P on a resistance." Additionally, changes in temperature and altitude can also affect the air pressure and thus the "Air Δ P" on a resistance.

Why is understanding "Air Δ P on a resistance" important in scientific research?

"Air Δ P on a resistance" is an important concept in fluid dynamics and aerodynamics. It is especially relevant in the design and optimization of various systems and equipment, such as HVAC systems, pipelines, and engines. Understanding "Air Δ P" can help scientists and engineers make informed decisions and improve the efficiency and performance of these systems.

How can "Air Δ P on a resistance" be reduced?

To decrease "Air Δ P on a resistance," one can increase the size of the resistance, decrease the air flow, or use a smoother and more streamlined shape for the resistance. Additionally, certain mechanisms, such as diffusers or flow straighteners, can be used to reduce the impact of "Air Δ P" on a resistance.

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