A study on the flow field and local heat transfer performance due to geometric scaling of centrifugal fans

Stafford, Jason; Walsh, Edmond J.; Egan, Vanessa

doi:10.1016/j.ijheatfluidflow.2011.09.002

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Fans are widely used in industrial and civil engineering as ventilation and dust removal equipment [1]. With the development of electrical equipment, fans are utilized to enhance heat dissipation [2] generated by computers and refrigerators. Different application scenarios put a series of requirements on the flow field and operation performance of fans [3,4].…”

Section: Introductionmentioning

confidence: 99%

Numerical study on airflow performance and mechanical characteristics of centrifugal fan

Bai

Tan

2022

E3S Web Conf.

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As small fans are widely used to dissipate the heat of the electronic components, a series of special requirements are put forward on the airflow performance and stress characteristics. In the present study, the computational fluid dynamics (CFD) method is adopted to study the airflow characteristics of a specific type of fan, including the fluid pressure distribution, flow velocity field and fluid streamline distribution. The stress characteristics of the fan blades are systematically analyzed based on the fluid-solid coupling and thermal-solid coupling methods. The results show that with the rotation speed of 1400 rpm, the airflow velocity in the air duct is unevenly distributed, and some eddy disturbances form and occur in the flow field. To improve the operating efficiency of the fan, appropriate optimization schemes should be adopted to reduce the intensity and range of the eddy influence. When the inlet temperature is 20 °C, the stress on the impeller is mainly caused by centrifugal force and thermal load. As the inlet temperature increases, the effect of the thermal load becomes increasing. While for the centrifugal force, its influence on the impeller gradually disappears and completely disappears when the temperature reaches 50 °C.

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Section: Introductionmentioning

confidence: 99%

Numerical study on airflow performance and mechanical characteristics of centrifugal fan

Bai

Tan

2022

E3S Web Conf.

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“…Optimal control problem of partial differential equations is encountered [3][4][5] in many applications ranging from engineering to science. The mathematical model arises in many engineering and physical processes such as heat conduction [2], fluid mechanics [6], and material sciences [7]. Many researchers considered a similar optimal control problem of partial differential equations [8,9]:…”

Section: Introductionmentioning

confidence: 99%

Optimal Control Method of Parabolic Partial Differential Equations and Its Application to Heat Transfer Model in Continuous Cast Secondary Cooling Zone

Wang

Luo

2015

Advances in Mathematical Physics

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Our work is devoted to a class of optimal control problems of parabolic partial differential equations. Because of the partial differential equations constraints, it is rather difficult to solve the optimization problem. The gradient of the cost function can be found by the adjoint problem approach. Based on the adjoint problem approach, the gradient of cost function is proved to be Lipschitz continuous. An improved conjugate method is applied to solve this optimization problem and this algorithm is proved to be convergent. This method is applied to set-point values in continuous cast secondary cooling zone. Based on the real data in a plant, the simulation experiments show that the method can ensure the steel billet quality. From these experiment results, it is concluded that the improved conjugate gradient algorithm is convergent and the method is effective in optimal control problem of partial differential equations.

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Coupled thermo-fluid stress analysis of Kambara Reactor with various anchors in the stirring of molten iron at extremely high temperatures

Huang

2014

Applied Thermal Engineering

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A study on the flow field and local heat transfer performance due to geometric scaling of centrifugal fans

Cited by 7 publications

References 17 publications

Numerical study on airflow performance and mechanical characteristics of centrifugal fan

Numerical study on airflow performance and mechanical characteristics of centrifugal fan

Optimal Control Method of Parabolic Partial Differential Equations and Its Application to Heat Transfer Model in Continuous Cast Secondary Cooling Zone

Coupled thermo-fluid stress analysis of Kambara Reactor with various anchors in the stirring of molten iron at extremely high temperatures

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