The Conceptual Design of High Pressure Reversible Axial Tunnel Ventilation Fans

Sheard, Anthony G.; Daneshkhah, Kasra

doi:10.1155/2012/562309

Cited by 7 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The studied fan is 2.24 m in diameter, running at 1500 revolutions per minute and therefore has a blade-tip speed of 175 m per second. Sheard and Daneshkhah 25 considered the practicality of developing a 2.5-m diameter tunnel ventilation fan operating at 1500 revolutions per minute, and therefore having a blade-tip speed of 196 m per second. They evaluated the potential of three new tunnel ventilation fan concepts and rejected a 2.5-m diameter fan running at 1500 revolutions per second because of the high-noise level that occurs with the increase in blade-tip speed.…”

Section: Description Of the Test Casementioning

confidence: 99%

The application of sinusoidal blade-leading edges in a fan-design methodology to improve stall resistance

Corsini

Delibra

Sheard

2013

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Taking inspiration from previous biomimetic studies on the performance of humpback whale flippers, this paper reports a programme of work to design a 'whale-fan' that incorporates a sinusoidal leading-edge blade profile that mimics the tubercles on humpback whales flippers. Previous researchers have used two-dimensional cascades of aerofoils to study the effects of a sinusoidal profile on aerofoil lift and drag performance. The research was primarily concerned with elucidating the fluid-flow mechanisms induced by the sinusoidal profile and the impact of those mechanisms on aerofoil performance. The results indicate that a sinusoidal leading-edge profile has improved lift recovery post-stall and, thus, is inherently more aerodynamically resistant to the effect of stall. The reported research focuses on the application of previous research conducted with infinite span cascades of aerofoils to the design and optimisation of a finite span aerofoil. The paper presents the assumptions when developing a three-dimensional aerofoil-design methodology that correlates the sinusoidal profile of the blade-leading edge with the desired vorticity distribution at the trailing edge. The authors apply the developed methodology to the design of a fan blade's tip region to control separation at the trailing edge. The paper presents numerically derived whale-fan performance characteristics and compares them with both numerically and experimentally derived performance characteristics of the baseline fan

show abstract

Section: Description Of the Test Casementioning

confidence: 99%

The application of sinusoidal blade-leading edges in a fan-design methodology to improve stall resistance

Corsini

Delibra

Sheard

2013

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

“…Three high pressure reversible fan concepts, like a two-stage counter rotating fan, a single-stage high speed fan and a two-stage fan with a single motor and impeller on each end of the motor shaft are presented in paper [13].…”

Section: Introductionmentioning

confidence: 99%

“…Paper [14] presents the designed reversible jet fan, obtained experimental data and CFD results. Reversible aerodynamic design, in fact, limits the maximum fan pressure side [13]. Paper [15] presents a numerical optimization procedure for performance improvement of a jet fan.…”

Section: Introductionmentioning

confidence: 99%

New Design of the Reversible Jet Fan

et al. 2020

View full text Add to dashboard Cite

This paper presents two designs of the axial reversible jet fan, with the special focus on the impeller. The intention was to develop a reversible axial jet fan which operates in the same way in both rotating directions while generating thrust as high as possible. The jet fan model with the outer diameter 499.2 ± 0.1 mm and ten adjustable blades is the same, while it is in-built in two different casings. The first construction is a cylindrical casing, while the second one is profiled as a nozzle. Thrust, volume flow rate, consumed power and ambient conditions were measured after the international standard ISO 13350. Results for both constructions are presented for three impeller blade angles: 28°, 31° and 35°, and rotation speed in the interval n = 400 to 2600 rpm. The smallest differences in thrust, depending on the fan rotation direction, as well as the highest thrust are achieved for the first design with the cylindrical casing and blade angle at the outer diameter of 35°. Therefore, it was shown that fan casing significantly influences jet fan characteristics. In addition, the maximum thrust value and its independence of the flow direction is experimentally obtained for the angle of 39° in the cylindrical casing.

show abstract

“…Reversible single-stage axial fans are largely employed in tunnel and metro ventilation systems, to supply and extract air from the tunnels. State-of-the-art solutions include the use of dedicated fans for air supply and extraction, but in general the use of reversible fan rotors, characterized by truly reversible blade sections, has been established as the most convenient [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

On Surrogate-Based Optimization of Truly Reversible Blade Profiles for Axial Fans

Angelini

Bonanni

Corsini

et al. 2018

Designs

View full text Add to dashboard Cite

Open literature offers a wide canvas of techniques for surrogate-based multi-objective optimization. The large majority of works focus on methodological and theoretical aspects and are applied to simple mathematical functions. The present work aims at defining and assessing surrogate-based techniques used in complex optimization problems pertinent to the aerodynamics of reversible aerofoils. Specifically, it addresses the following questions: how meta-model techniques affect the results of the multi-objective optimization problem, and how these meta-models should be exploited in an optimization test-bed. The multi-objective optimization problem (MOOP) is solved using genetic optimization based on non-dominated sorting genetic algorithm (NSGA)-II. The paper explores the possibility to reduce the computational cost of multi-objective evolutionary algorithms (MOEA) using two different surrogate models (SM): a least square method (LSM), and an artificial neural network (ANN). SMs were tested in two optimization approaches with different levels of computational effort. In the end, the paper provides a critical analysis of the results obtained with the methodologies under scrutiny and the impact of SMs on MOEA. The results demonstrate how surrogate model incorporation into MOEAs influences the effectiveness of the optimization process itself, and establish a methodology for aerodynamic optimization tasks in the fan industry.

show abstract

The Conceptual Design of High Pressure Reversible Axial Tunnel Ventilation Fans

Cited by 7 publications

References 9 publications

The application of sinusoidal blade-leading edges in a fan-design methodology to improve stall resistance

The application of sinusoidal blade-leading edges in a fan-design methodology to improve stall resistance

New Design of the Reversible Jet Fan

On Surrogate-Based Optimization of Truly Reversible Blade Profiles for Axial Fans

Contact Info

Product

Resources

About