July 8, 2020 Dataset Restricted Access

Tas-Köhler, Sibel; Franz, Ronald; Boden, Stephan; Hampel, Uwe

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    "title": "Microfocus X-ray tomography data set of boiling flow in vertical rod bundle with spacer grid at constant heat flux condition", 
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    "creators": [
      {
        "name": "Tas-K\u00f6hler, Sibel", 
        "affiliation": "HZDR", 
        "orcid": "0000-0001-9264-5129"
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      {
        "name": "Franz, Ronald", 
        "affiliation": "HZDR"
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      {
        "name": "Boden, Stephan", 
        "affiliation": "HZDR", 
        "orcid": "0000-0002-7170-078X"
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      {
        "name": "Hampel, Uwe", 
        "affiliation": "HZDR", 
        "orcid": "0000-0002-7371-0148"
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    "keywords": [
      "X-Ray Computed Tomography", 
      "Phase fraction", 
      "Rod bundle", 
      "Boiling flow"
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    "publication_date": "2020-07-08", 
    "notes": "The data was acquired within a research project which was funded by the Federal Ministry of Economic Affairs and Energy of Germany under grant number 1501473C.", 
    "description": "<p>The test section of the rod bundle experimental facility at HZDR consists of a vertically aligned PMMA channel with an upward flow of the working fluid. The cross-section of the channel is quadratic (inner edge length: 37 mm) and contains nine directly electrically heated rods (material: titanium-alloy, diameter: 10 mm, wall thickness: 0.3 mm) which are arranged in an orthogonal 3 by 3 matrix (rod axis distance: 12.8 mm). Circa 190 mm downstream of the start of the heating zone a 30 mm long spacer for the rods with tilted flow guiding vanes is mounted. These vanes are aimed to increase lateral flow velocities within the subchannels. Working fluid was octafluorocyclobutane (CAS 115-25-3, RC318). The experimental facility is comprehensively instrumented for measurement of flow, temperature and pressure/pressure difference. For non-invasive three-dimensional high-resolution measurement of a temporally averaged volumetric void fraction within the working fluid flowing around the heating rods in the subchannels an X-ray computer tomography measurement system was set up.<br>\nThe presented dataset contains measurement data of the experimental facility&#39;s instrumentation and tomographic void fraction data of experiments with four different configurations of the flow guiding vanes (without vanes, 20&deg;, 29&deg;, 40&deg;) for four different flow velocities between 0.4 m/s and 1.3 m/s at a heat flow density of 85.7 kW/m&sup2;.</p>", 
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