Numerical investigation on Coanda flow over a logarithmic surface

Gan, Cai Yin; Sahari, Khairul Salleh Mohamed; Tan, Ching Seong

doi:10.1007/s12206-015-0615-y

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…Many concrete mixing tanks on the market adopt the nonisometric conical logarithmic-style spiral blade, because it has good streamline relative to Archimedes' spiral structure. The concrete inside the mixing tank has good fluidity [1,2]. The mixing tank usually has three parts, including anterior cone, middle tube and rear cone.…”

Section: Introductionmentioning

confidence: 99%

The Connecting Method for the Spiral Blades of Concrete Mixer Truck

et al. 2020

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For the spiral blade of the concrete mixing tank of concrete mixer truck, in order to satisfy the stirring and discharging performance, the installation angle and helix angle of the blade should be assigned according to their segmentation function. Due to the different helix angles and the installation tilt angles, a junction gap of blade is formed at the joint, resulting in the severe silting of discharge or the uneven agitation. We put forward a more reasonable solution by using the MFG (method of fitting gradient) to solve the gap connection of spiral blades. The MFG that can reduce the discharging residual rate of the mixing material has been verified by experiments and applied to actual mass production. We also make the coupling simulation of Multi-Physics Field based on simulation software 17-STARCCM+® to visually verify the scientificity of design and study the complex stresses distribution inside the actual mixing tank. Finally, we provide an up-to-date reference for the design of spiral logarithmic blade, solving the problem of the gap at the traditional spiral-blade connection.

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Section: Introductionmentioning

confidence: 99%

The Connecting Method for the Spiral Blades of Concrete Mixer Truck

et al. 2020

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“…More precisely, it is shown how the effect of a jet over the aerodynamical profile can be used to augment the lift and decrease the drag in the turbine blades. Gan et al [21] simulated a two-dimensional jet flow over a logarithmic surface seeking to evaluate the behavior of the oncoming jet over the profile. Moreover, a parametric study about the effect of the outlet height of device over fluid dynamic behavior of jet flow was performed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Turbulent Air and Water Flows in a Nozzle Based on the Coanda Effect

Halal

Marques

Rocha

et al. 2019

JMSE

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In the present work it is performed a numerical study for simulation of turbulent air and water flows in a nozzle based on the Coanda effect named H.O.M.E.R. (High-Speed Orienting Momentum with Enhanced Reversibility). The main purposes of this work are the development of a numerical model for simulation of the main operational principle of the H.O.M.E.R. nozzle, verify the occurrence of the physical principle in a device using water as working fluid and generate theoretical recommendations about the influence of the difference of mass flow rate in two inlets and length of septum over the fluid dynamic behavior of water flow. The time-averaged conservation equations of mass and momentum are solved with the Finite Volume Method (FVM) and turbulence closure is tackled with the k-ε model. Results for air flow show a good agreement with previous predictions in the literature. Moreover, it is also noticed that this main operational principle is promising for future applications in maneuverability and propulsion systems in marine applications. Results obtained here also show that water jets present higher deflection angles when compared with air jets, enhancing the capability of impose forces to achieve better maneuverability. Moreover, results indicated that the imposition of different mass flow rates in both inlets of the device, as well as central septum insertion have a strong influence over deflection angle of turbulent jet flow and velocity fields, indicating that these parameters can be important for maneuverability in marine applications.

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A bidirectional valveless piezoelectric micropump with three chambers applying synthetic jet

Zhang

et al. 2016

J Mech Sci Technol

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Numerical investigation on Coanda flow over a logarithmic surface

Cited by 7 publications

References 8 publications

The Connecting Method for the Spiral Blades of Concrete Mixer Truck

The Connecting Method for the Spiral Blades of Concrete Mixer Truck

Numerical Study of Turbulent Air and Water Flows in a Nozzle Based on the Coanda Effect

A bidirectional valveless piezoelectric micropump with three chambers applying synthetic jet

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