Criterion analysis and experimental study of combustion mechanisms in a bidirectional swirling flow and their relationship with pollutants emission

2020 ◽  
Author(s):  
Alexander I. Guryanov ◽  
Oleg A. Evdokimov ◽  
Marina M. Guryanova ◽  
Sergey V. Veretennikov
Keyword(s):  
Experimental Study ◽  
Swirling Flow ◽  
Pollutants Emission ◽  
Criterion Analysis

An experimental study on swirling flow behind a round cylinder in the horizontal circular tube

2005 ◽  
Vol 19 (12) ◽  
pp. 2270-2280
Author(s):  
Tae-Hyun Chang ◽  
Hae Soo Lee
Keyword(s):  
Experimental Study ◽  
Swirling Flow ◽  
Circular Tube ◽  
Round Cylinder

Forced and Periodic Vortex Breakdown

1967 ◽  
Vol 89 (3) ◽  
pp. 609-615
Author(s):  
Turgut Sarpkaya
Keyword(s):  
Experimental Study ◽  
Opposite Direction ◽  
Vortex Tube ◽  
Vortex Breakdown ◽  
Swirling Flow ◽  
Typical Data ◽  
Circular Orifice ◽  
Pros And Cons

The results of an experimental study of the forced and periodic breakdown of a confined vortex rotating in the opposite direction are presented. The vortex tube consists of two chambers connected by a short conduit through streamlined transitions. The upstream end is closed by a plain wall, and a circular orifice is provided at the downstream end. The swirling flow and the breaker-vortex are generated by introducing varying proportions of air or water through tangential ports located near the upstream and downstream walls of the unit. The cases of single breakdown and periodic breakdown are explored and typical data are presented for each case. Finally, the pros and cons of the two existing transition theories are discussed.

Prediction of Heat Transfer in Turbulent Decaying Swirling Flow

1999 ◽  
Author(s):  
Yusuf A. Uskaner
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Experimental Study ◽  
Friction Factor ◽  
Loss Factor ◽  
Swirling Flow ◽  
Swirling Flows ◽  
Heat Transfer Augmentation ◽  
Relative Roughness ◽  
Inlet Swirl

Abstract This paper presents an aproach for the prediction of heat transfer augmentation in decaying swirling flow in a pipe by making an analogy between the increase in friction factor due to swirl and increase in heat transfer due to swirl. The proposed method can be used to predict heat transfer for decaying swirling flow in smooth and rough pipes which can be applied to different swirl generators based on the known inlet swirl conditions. An experimental study is performed regarding the swirling flow of air in smooth and rough pipes. The experimental study covered only the fluid dynamics of swirling flow. No heat transfer experiments were done. It is determined experimentally that in swirling flows degree of swirl decays continuously along the smooth and rough pipes and the total loss factor is the sum of friction factor for non-swirling flow and the swirl loss factor. Swirl loss factor is found to be a function of the degree of swirl and pipe relative roughness. Using the relations obtained experimentally for the variation of swirl strength and loss factor along the pipe, an equation is proposed to be used for the prediction of heat transfer in turbulent decaying swirling flows.

Experimental study of loss of drop shape stability in a swirling flow

2013 ◽  
Vol 26 (5) ◽  
pp. 391-395 ◽  
Author(s):  
V. A. Arkhipov ◽  
A. P. Berezikov ◽  
V. F. Trofimov ◽  
A. S. Usanina
Keyword(s):  
Experimental Study ◽  
Swirling Flow ◽  
Shape Stability ◽  
Drop Shape

An Experimental Study on Swirling Flow in a Sudden Expansion Tube using 3D PIV Technique

2009 ◽  
Vol 33 (2) ◽  
pp. 272-281
Author(s):  
Tae-Hyun Chang ◽  
Sang-Cheol Kil
Keyword(s):  
Experimental Study ◽  
Swirling Flow ◽  
Sudden Expansion ◽  
Expansion Tube ◽  
Piv Technique

scholarly journals Passively Enhanced Natural Convection Heat Transfer via Swirl Effect

2021 ◽  
Author(s):  
L. Di Liddo ◽  
D. Naylor
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Natural Convection ◽  
Convective Heat Transfer ◽  
Transfer Rate ◽  
Swirling Flow ◽  
Convection Heat Transfer ◽  
Circular Disk ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

A numerical and experimental study, in the preliminary stages, has been conducted examining the effect of swirling flow on the natural convective heat transfer rate from a flat, horizontal, heated, upward facing, isothermal circular disk surrounded by insulation.

Swirling flow in a model of the carotid artery: Numerical and experimental study

2018 ◽  
Author(s):  
Anna A. Kotmakova ◽  
Yakov A. Gataulin ◽  
Andrey D. Yukhnev
Keyword(s):  
Experimental Study ◽  
Carotid Artery ◽  
Swirling Flow

Experimental Study of Flow Field Effect on Spray and Flame Structure in Swirl Stabilized Combustor

2019 ◽  
Author(s):  
Raju Murugan ◽  
Dhanalakshmi Sellan ◽  
Pankaj S. Kolhe
Keyword(s):  
Experimental Study ◽  
Reynolds Number ◽  
Spatial Distribution ◽  
Gas Turbine ◽  
Liquid Fuel ◽  
Swirling Flow ◽  
Mixture Fraction ◽  
Flame Temperature ◽  
Operating Conditions ◽  
Fuel Gas

Abstract The spatial distribution of spray plays a key role in liquid fuel combustion, which dictates the local mixture fraction and the flame temperature distribution in gas turbine engines. The swirling flow creates further decomposition of the spray droplets in liquid fuel gas turbine engine, which increases the surface area of the droplets. Turbulent mixing due to the swirling flow is essential for preheating of unburned products and flame holding in the combustor. A lab-scale swirl stabilized liquid fuel combustor was designed and fabricated with the geometric swirl number (SN) of 1. Combustor flow geometry involves internal spray from flow blurring twin-fluid atomizer, surrounded by swirling airflow which is confined with co-flow air to provide full optical access. At constant spray operating conditions, the swirl Reynolds number (Re) is increased whereas co-flow velocity was maintained constant at 0.4 m/s. An experimental study was carried out to understand the effect of Reynolds number on the aerodynamic structure of airflow, the spatial distribution of spray structure and kerosene flame structures using Particle Image Velocimetry (PIV) and direct imaging. The experimental results show that the flow structure and spray spreads radially with the increase in swirl Reynolds number and the corresponding core spray height decreases, which were evident from flame images.

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