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Application

Here is our analysis of past cases here.
Each of the PDF file details, the video also available.

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U nsteady Flow Around a Heavy Vehicle Model

OUTLINE

The aerodynamic features of a model of tractor-trailer with meandering motion were investigated.
It is revealed from the calculation that considerable fluctuations of aerodynamic forces inevitably act on both the tractor and the trailer as a result of unsteady interaction of the flow separated from the tractor with the trailer.

For more details please see the PDF file >> PDF

Unsteady Flow in a Mixed-flow Pump

OUTLINE

In order to predict the fluctuation of radial force acting on a rotating impeller, the internal flow of a mixed-flow pump stage was computed under an operating condition: an off-design point(Q /Qd = 0.65). As a result, it was observed that a strong tip leakage vortex was formed from the tip of each impeller vane.The tip leakage vortex causes interaction between the leakage vortex and the adjacent impeller-vane or diffuser vane, thus resulting in the formation of the strong vortex bubble in the diffuser section.Also, it was confirmed that radial force components were periodically fluctuating with the interaction between rotating impeller-vanes and stationary guide-vanes.

For more details please see the PDF file >> PDF

A Flow in Pump Sump

OUTLINE

In waterworks, sewage disposal plants and power stations, pump sumps are increasingly tending to be smaller and faster, primarily as a result of the need to reduce costs and space requirements.These small and faster pump sumps are likely to cause eddies in the main tank, which can result in increased noise and vibration. In the past, these have been best observed through experiments in the main tank model, allowing the study and evaluation of the eddies that occur in the water. These have ranged over the side walls and bottom surface to the entrance of bell mouth, and in the air, ranged from free surface to the entrance of the bell mouth. Such experiments have contributed towards the creation of a new standard form of pump sump and the many and various kinds of eddy prevention devices.

However, the recent development of computation analyses technology has made it possible to predict the occurrence of these eddies through the use of computational fluid dynamics (CFD), allowing for preliminary examination before the model experiments and parameter studies for forming tanks or measures to prevent eddies.We believe that our CFD software can be a useful tool for the analysis of the flow in pump sump and to help predict the eddies in the water.

For more details please see the PDF file >> PDF

Interference of Impeller Vane and Stationary Vane in Diffuser Pump

OUTLINE

The interference of the impeller vane and the stationary vane in turbo machineries can be a main cause of noise and vibration.Therefore it is extremely desirable to have a means of simulating the flow directly without postulating any artificial boundaries like Sliding Surface, between the vanes. As it is one of the Vortex Methodsf features that it does not need to generate any calculation grid in the space, and it can easily deal with the moving boundary speed as a boundary condition, we believe it to be the best method of analysing a complex unsteady flow interfered with by the impeller and stationary vanes.

For more details please see the PDF file >> PDF

Aero- Dynamical Prediction of a Wind Wheel as to The Performance Level

OUTLINE

There has been worldwide research, development and interest in the effective and efficient use of wind force energy. Although wind force energy causes less damage to the environment, it is also intermittent and irregular, and its energy density is low.Therefore it is necessary for the new vane form to be able to perform with high-energy efficiency and be able to supply steady output in a large scaled operation. Also, it is extremely desirable to reduce the drag (of the) coefficient, which is the main form of energy loss for wind wheels. Moreover, it has to be able to maintain a stable performance towards the changes of the Reynolds number and the attack angle. We believe that our fluid analyses technology can be utilised for the development of a new form of the vane.

For more details please see the PDF file >> PDF

The Flow Around a Fish

OUTLINE

There has been worldwide research, development and interest in the effective and efficient use of wind force energy. Although wind force energy causes less damage to the environment, it is also intermittent and irregular, and its energy density is low. Therefore it is necessary for the new vane form to be able to perform with high-energy efficiency and be able to supply steady output in a large scaled operation. Also, it is extremely desirable to reduce the drag (of the) coefficient, which is the main form of energy loss for wind wheels. Moreover, it has to be able to maintain a stable performance towards the changes of the Reynolds number and the attack angle. We believe that our fluid analyses technology can be utilised for the development of a new form of the vane.

For more details please see the PDF file >> PDF

An Analysis of an Unsteady Trajectory of a Football

OUTLINE

There has been worldwide research, development and interest in the effective and efficient use of wind force energy. Although wind force energy causes less damage to the environment, it is also intermittent and irregular, and its energy density is low. Therefore it is necessary for the new vane form to be able to perform with high-energy efficiency and be able to supply steady output in a large scaled operation. Also, it is extremely desirable to reduce the drag (of the) coefficient, which is the main form of energy loss for wind wheels. Moreover, it has to be able to maintain a stable performance towards the changes of the Reynolds number and the attack angle. We believe that our fluid analyses technology can be utilised for the development of a new form of the vane.

For more details please see the PDF file >> PDF