Source: Crazy Mechanical Control
Tesla valve is a genius scientist Nikola Tesla invented a single guide air flow valve, without any moving parts, no need to input method energy to achieve air flow single guide. Its forward flow and reverse flow are very different, do not need internal mechanical movement, the use of space structure to promote the flow of gas, through the physical structure to accelerate the gas, reduce the energy loss of gas in transportation.
Tesla valve is a fixed geometry passive single guide valve that allows fluid to flow in one direction. Because of its fixed geometry, it can replace the movable valve because it compensates for the fact that traditional valves are easily damaged due to the need for movable parts. Due to the inertia of the fluid, the flow resistance is different when passing through the valve in different directions, thus achieving unidirectional flow".
Let's share an animation made by LearnEngineering that explains how Tesla valves work:
Video Author: LearnEngineering Video Translator: A selection of @YouTube
How Tesla valves work: When ignited from the left side of the valve with an igniter, you can see the process of the flame swimming in the internal channel, like the backflow formed internally, and when tested from the opposite direction, the gas flow speed becomes faster, and these structures seem to provide acceleration for the flame. The gas expands in the Tesla valve and then compresses, and the change in pressure difference produces a thrust to push the gas out more quickly.
For most in-tube flows, the driving force of its flow comes from pressure, that is, the flow flows from the high pressure area to the low pressure area (of course, there are also mechanical or other means to make the fluid flow from the low pressure area to the high pressure area, such as the intake tract of the compressor and the aircraft). For flow, where the driving force comes from pressure, the core reason for the flow is the pressure difference between the two ends of the flow. The total pressure and environmental pressure at the outlet are used to calculate the flow rate, and then the flow rate is obtained from the cross-sectional area of the outlet.
To sum up, the faucet can control the amount of water output can be explained by the fact that when the faucet is turned on to the maximum, the total pressure loss is the smallest, and when the faucet is closed, the total pressure loss is the largest.
The ingenuity of this valve is that when the fluid flows in the downward direction, the total pressure loss is small, but the loss when the fluid flows backwards is extremely large, which can be understood as blowing air from one side, the outlet pressure drops to near the atmospheric pressure, the driving pressure almost disappears, and there is almost no flow, but it should be noted that there is still a subtle flow (generally called leakage) at this time, with the increase of the length of the valve, the leakage amount will decrease, and the gas can be considered to be sealed within the acceptable range (basically cannot be felt).
In 1935, Tesla drilled a deep well in its laboratory and put down a steel casing in the well. Then, plug the wellhead and inject vibrations of different frequencies into the well. The wonderful thing is that at a certain frequency, the ground will suddenly vibrate strongly and cause the collapse of the surrounding houses.
Some magazines at the time commented that "Tesla used a man-induced earthquake to almost level New York." This is the famous Tesla experiment, and this super transmission effect of small input and strong output is called the Tesla effect. Its essence is what everyone often calls "resonance".