The Tesla valve – A fluidic diode

2019 ◽  
Vol 57 (3) ◽  
pp. 201-201
Author(s):  
Doug Stith
Keyword(s):  
Fluidic Diode ◽  
Tesla Valve

scholarly journals A Study on Fluidic Diode for Wave Energy Conversion-Effect of Bypass Geometry on the Turbine Performance

2020 ◽  
Vol 10 (03) ◽  
pp. 270-278
Author(s):  
Keito Matsumoto ◽  
Manabu Takao ◽  
Shinya Okuhara ◽  
Miah Md. Ashraful Alam ◽  
Yoichi Kinoue
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Wave Energy Conversion ◽  
Turbine Performance ◽  
Fluidic Diode

scholarly journals Erratum to: “Fluidic diode” for passive unidirectional liquid transport bioinspired by the spermathecae of fleas

2018 ◽  
Author(s):  
Gerda Buchberger ◽  
Alexander Kogler ◽  
Agnes Weth ◽  
Richard Baumgartner ◽  
Philipp Comanns ◽  
...  
Keyword(s):  
Liquid Transport ◽  
Fluidic Diode

Bio-inspired “fluidic diode” for large-area unidirectional passive water transport even against gravity

2018 ◽  
Vol 283 ◽  
pp. 375-385 ◽  
Author(s):  
Gerda Buchberger ◽  
Richard Baumgartner ◽  
Alexander Kogler ◽  
Thomas Fritz ◽  
Siegfried Bauer ◽  
...  
Keyword(s):  
Water Transport ◽  
Large Area ◽  
Fluidic Diode

Passive fluidic diode for simple fluids using nested nanochannel structures

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Jingwen Mo ◽  
Long Li ◽  
Jun Wang ◽  
Zhigang Li
Keyword(s):  
Simple Fluids ◽  
Fluidic Diode

A Twin Unidirectional Impulse Turbine With Fluidic Diode for Wave Energy Conversion

2015 ◽  
Author(s):  
Hideki Sato ◽  
Manabu Takao ◽  
Shinya Okuhura ◽  
Miah Md. Ahsraful Alam ◽  
Toshiaki Setoguchi
Keyword(s):  
Wave Energy ◽  
Air Flow ◽  
Wind Tunnel Test ◽  
Past Study ◽  
Impulse Turbine ◽  
Energy Plant ◽  
Fluidic Diode ◽  
Major Fault ◽  
Unsteady Flow Condition ◽  
Low Efficiency

As an air turbine equipped with oscillating water column (OWC) based wave energy plant, a rectification-valve system has been invented to date. However, this turbine system has problems with the durability of the valves and the complex mechanism. Moreover, it has a major fault in that the valves must be large for high output. Therefore, a twin unidirectional impulse turbine topology has been suggested in previous studies in order to use conventional unidirectional turbines without valves [1, 2]. The topology is composed of two unidirectional impulse turbines. However, the past study indicated that the mean efficiency of the topology was shown to be low, when the performance prediction of the topology in oscillating airflow was carried out by means of quasi-steady analysis [2]. Further, the cause of the low efficiency is because part of the air flow gets through the unidirectional impulse turbine in the direction of low efficiency [2]. In this study, a fluidic diode [3, 4] is adopted in order to suppress the air flow rate into the inefficient turbine in a twin unidirectional impulse turbine topology for wave energy plant, and the effect of the fluidic diodes on the performance of twin unidirectional impulse turbine topology is investigated by a wind tunnel test and computational fluid dynamics (CFD). Further, its usefulness is discussed from a view point of the turbine mean efficiency under unsteady flow condition.

scholarly journals Design and Optimization of Strength type Negative Pressure Suction Force Pluck Port based on Tesla Valve

2021 ◽  
Author(s):  
Zijie Niu ◽  
XU Shengming ◽  
JIANG jiangang ◽  
ZHANG Jun
Keyword(s):  
Negative Pressure ◽  
Simulation Analysis ◽  
Flow Speed ◽  
Air Pressure ◽  
Maximum Pressure ◽  
Structure Parameters ◽  
Strengthening Effect ◽  
Suction Force ◽  
Pressure Suction ◽  
Tesla Valve

Abstract An apple pluck port based on negative pressure suction force can realize contactless apple plucking and also reduce possible damage to the apple. Accordingly, in this study, a strength type pneumatic pluck port was designed on the basis of a Tesla valve. First, a low air pressure block for mechanization of the Tesla valve structure at the intersection between the main and curved air passageway was theoretically modelled and analyzed. Then, the air pressure and the flow speed distribution were analyzed for three different types of structure parameters under various distances of the Tesla pluck port from the apple; on the basis of a fluent simulation, the maximum pressure difference at both sides of the apple was also simulated. Finally, the structure parameters under an optimal negative pressure field according to the simulation analysis were proposed, and a manufactured experimental test was conducted to compare the results with the simulation. The simulation and experimental data prove that when the included angle between the main and curved air passageway of the Tesla pluck port is lower than 45°, the low air pressure block at the intersection between the main and curved air passageway of the Tesla valve affects the flow of the pluck port and extends the length of the low air pressure block. The Tesla pluck port guarantees a flow in the pipe when the pipe port diameter is 10–15 mm larger than the apple diameter, ensuring the negative strengthening effect of the Tesla pluck port. The experiment proves that the Tesla pluck port designed in this study exhibits a better negative pressure strengthening effect than that achieved via previously existing methods, which can strengthen the plucking effect.

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