Experimental analysis of the flow characteristics of a pressure-atomised spray

An experimental analysis has been carried out to investigate the thermal and friction factor characteristics of fluid flow in a tube with double strip helical screw tape (DS-HST) inserts with different values of twist ratio and compared with single strip helical screw tape inserts and plain tube. Water is used as a working fluid at different flow rates with constant heat flux conditions. CFD analysis is also carried out to visualize thermal and fluid flow characteristics of fluid flow in tube with inserts. Experimental results have showed that Nusselt number and friction factor have attained excellent enhancement with double strip helical screw tape inserts in the range of flow rates than single strip helical screw tape inserts at the value of twist ratio 1.5. Correlation is also developed for Nusselt number with a range of Reynolds number, twist ratio and number of strips. Moreover, the performance ratio has attained maximum value at twist ratio of 2.5 with high values of flow rate. It is concluded that DS-HST is able to attain enhancement in the efficiency of heat exchanger, causing a reduction in size for thermal applications.

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Numerical simulation and experimental analysis of labyrinth valve flow characteristics based on CFX

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/788/1/012006 ◽

2020 ◽

Vol 788 ◽

pp. 012006

Author(s):

Tao Wang ◽

Maosheng Wang ◽

Youliang Su ◽

Song Mu ◽

Kai Jing ◽

...

Keyword(s):

Numerical Simulation ◽

Experimental Analysis ◽

Flow Characteristics

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Experimental Analysis on Fuel Flow Characteristics in the Nozzle for Direct Injection Engines

10.4271/931002 ◽

1993 ◽

Cited By ~ 5

Author(s):

Kenji Date ◽

Hiroyuki Nobechi ◽

Hiroyuki Kano ◽

Masaaki Kato ◽

Takio Oya

Keyword(s):

Experimental Analysis ◽

Direct Injection ◽

Flow Characteristics ◽

Direct Injection Engines ◽

Fuel Flow

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Influence of aeration induced by piers on the starting position of the flow aeration and extreme pressures in stepped spillways

RBRH ◽

10.1590/2318-0331.262120200113 ◽

2021 ◽

Vol 26 ◽

Author(s):

Priscila dos Santos Priebe ◽

Rute Ferla ◽

Carolina Kuhn Novakoski ◽

Aline Saupe Abreu ◽

Eder Daniel Teixeira ◽

...

Keyword(s):

Physical Model ◽

Experimental Analysis ◽

Flow Behavior ◽

Flow Characteristics ◽

Exceedance Probability ◽

Stepped Spillway ◽

Air Concentration ◽

Stepped Spillways ◽

Starting Position ◽

Cavitation Phenomenon

ABSTRACT The operation of stepped spillways is limited by a range of discharges due to the risk of occurrence of the cavitation phenomenon and erosion on its steps. Since there is a demand for spillways with the possibility of overflow of greater discharges, the designs seek to increase the air concentration of the flow, which can occur through the installation of piers in the spillway in order to protect the structure from the above mentioned damage. The aim of this work is to analyze flow characteristics and extreme minimum and maximum pressures with non-exceedance probability of 0.1% and 99.9% acting next to the step edges of the spillway with aeration induced by piers through an experimental analysis in a physical model. Based on the results obtained, flow behavior was defined and equations for predicting the extreme pressures that occur along the stepped spillway with aeration induced by piers were proposed.

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