Jackobs Group Australia Pty Ltd

Sydney, Australia

Jackobs Group Australia Pty Ltd

Sydney, Australia
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Wongpanyathaworn K.,Jackobs Group Australia Pty Ltd | Larkin D.J.,Jackobs Group Australia Pty Ltd
Advances and Applications in Fluid Mechanics | Year: 2014

An experimental investigation using wind tunnel was conducted to evaluate the performance of blended wing body (BWB). Tests were conducted at three wind speeds of 25, 30 and 35m/s and angle of incidences (α) and side slip angles (β) that varied between ±25°. Results were analysed in terms of non-dimensional longitudinal forces and lateral forces and moments. It was found that the BWB model can operate at quite high angle of incidence and has static longitudinal stability, positive attributes that may contribute to new designs of enhanced performance and safety. © 2014 Pushpa Publishing House, Allahabad, India.


Wongpanyathaworn K.,Jackobs Group Australia Pty Ltd | Ahn B.,Jackobs Group Australia Pty Ltd
Advances and Applications in Fluid Mechanics | Year: 2014

On a lifting body, as the angle of attack (α) increases, the flow loses momentum resulting in flow separation. The situation can often be rectified by the injection of additional energy to the flow. In the present study, speakers were used as a means of internal excitation to vibrate a NACA0015 wing to impart such energy. When the flow was excited at a favourable frequency, flow separation was suppressed, and delay in stall angle of attack (αstall) occurred. From this study, relationship between the excitation frequencies (fe), shedding frequencies (fs) and the Strouhal numbers (Sr) was also obtained. © 2014 Pushpa Publishing House, Allahabad, India.


Wongpanyathaworn K.,Jackobs Group Australia Pty Ltd | Shun S.,Jackobs Group Australia Pty Ltd
Advances and Applications in Fluid Mechanics | Year: 2014

The flow-field interaction produced by a multiple orifice Air Jet Vortex Generator (AJVG) characterized by an injection width and velocity that both increased monotonically as a function of Euler's number (e) is presented. The exponential qualities of the jet reduced the near field entrainment of ambient fluid into the resulting vortices which prevented premature weakening of the structure and resulted in an energy efficiency benefit when used to suppress flow separation over an airfoil. The current examines the flow-field produced by this configuration of AJVG and provides an explanation into the separation control characteristics of the device which is currently lacking. © 2014 Pushpa Publishing House, Allahabad, India.


Wongpanyathaworn K.,Jackobs Group Australia Pty | Shun S.,Jackobs Group Australia Pty
JP Journal of Heat and Mass Transfer | Year: 2014

Previous experiments on multiple orifice AJVGs used for the purposes of separation control over airfoils are sparse. An experimental investigation was, therefore, conducted using multiple orifice air jet vortex generators at the aerodynamics research laboratory of the University of New South Wales. A macroscopic flow field analysis is then conducted of the flow dynamics and forms the basis of this paper. The new insight provided has the prospect of contributing to more efficient flow control designs. © 2014 Pushpa Publishing House, Allahabad, India.


Wongpanyathaworn K.,Jackobs Group Australia Pty
JP Journal of Heat and Mass Transfer | Year: 2014

In this paper, explanations are sought to the aerodynamic performance enhancement gains on lifting bodies due to the application of multiple orifice air jet vortex generators from a mixing perspective. This provides for a greater microscopic analysis of the flow and better understanding of the overall flow physics. Application of such multiple air jet vortex generators with a greater focus on mixing aspects may result in more viable flow control strategies. © 2014 Pushpa Publishing House, Allahabad, India.

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