Test Data AC7-03: Difference between revisions
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An experimental validation was performed for two operation points, the partial load (<math> Q=2.5~l/min </math>) and the nominal load (<math> Q=4.5~l/min </math>) at a rotational speed of <math> n=7,900~r/min </math>. The numerical VAD model was explained in section >>Flow Domain Geometry<<. This was originally created exclusively for numerical investigations. In order to enable an adequate validation of the simulated VAD flow, the following requirements were placed on the experimental model during conceptual design: | An experimental validation was performed for two operation points, the partial load (<math> Q=2.5~l/min </math>) and the nominal load (<math> Q=4.5~l/min </math>) at a rotational speed of <math> n=7,900~r/min </math>. The numerical VAD model was explained in section >>Flow Domain Geometry<<. This was originally created exclusively for numerical investigations. In order to enable an adequate validation of the simulated VAD flow, the following requirements were placed on the experimental model during conceptual design: | ||
* Due to the small dimensions and narrow gaps, the model to be manufactured must have | |||
have tolerances in the range of <math> 10-20~\mu m </math>. | |||
* In the numerical model, the VAD has no axial gaps between rotating and stationary components. | |||
and stationary components. The experimental model must therefore have as small as possible | |||
axial gaps between these components. | |||
In the numerical model, a hydraulically smooth flow is assumed in the immediate vicinity of the wall. | |||
is assumed. Also in the experimental model, a hydraulically smooth flow should be | |||
should be present at the walls. | |||
No mechanical drive for the impeller is considered in the numerical model. | |||
Since the experimental model requires a drive, it must be placed as free as possible from interference | |||
for the flow. | |||
It should be possible to measure various flow variables with the model to be produced. | |||
Thus, in the first measurement campaign, the goal is to determine the head characteristic curve. | |||
However, the model is also to be used in the future to measure the efficiency or | |||
optical measurements of velocities or turbulent quantities. | |||
Translated with www.DeepL.com/Translator (free version) | |||
==Description of Experiment== | ==Description of Experiment== | ||
Revision as of 11:10, 10 June 2021
Turbulent Blood Flow in a Ventricular Assist Device
Application Challenge AC7-03 © copyright ERCOFTAC 2021
Test Data
Overview of Tests
An experimental validation was performed for two operation points, the partial load () and the nominal load () at a rotational speed of . The numerical VAD model was explained in section >>Flow Domain Geometry<<. This was originally created exclusively for numerical investigations. In order to enable an adequate validation of the simulated VAD flow, the following requirements were placed on the experimental model during conceptual design:
- Due to the small dimensions and narrow gaps, the model to be manufactured must have
have tolerances in the range of .
- In the numerical model, the VAD has no axial gaps between rotating and stationary components.
and stationary components. The experimental model must therefore have as small as possible axial gaps between these components.
In the numerical model, a hydraulically smooth flow is assumed in the immediate vicinity of the wall.
is assumed. Also in the experimental model, a hydraulically smooth flow should be should be present at the walls.
No mechanical drive for the impeller is considered in the numerical model.
Since the experimental model requires a drive, it must be placed as free as possible from interference for the flow.
It should be possible to measure various flow variables with the model to be produced.
Thus, in the first measurement campaign, the goal is to determine the head characteristic curve. However, the model is also to be used in the future to measure the efficiency or optical measurements of velocities or turbulent quantities.
Translated with www.DeepL.com/Translator (free version)
Description of Experiment
Boundary Data
Measurement Errors
Measured Data
References
Contributed by: B. Torner — University of Rostock, Germany
© copyright ERCOFTAC 2021