Photomicrography for the measurement of steam wetness fraction in low pressure turbines /
The measurement of steam wetness fraction at the exit of a low-pressure (LP) turbine stage is important if the highest turbine performance is to be obtained and the least risk of damage to turbine blades due to impingement of water drops is desired. In this thesis several well-known methods for par...
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2001.
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| Subjects: |
| Summary: | The measurement of steam wetness fraction at the exit of a low-pressure (LP) turbine stage is important if the highest turbine performance is to be obtained and the least risk of damage to turbine blades due to impingement of water drops is desired. In this thesis several well-known methods for particle sizing are reviewed and the feasibility of applying each method to LP turbine steam is investigated. Photomicrography is chosen as the best alternative for the study, a technique whereby laser light is scattered from droplets in wet steam and the scattered light is magnified and photographed for measurements. A facility for testing the photographic measurement technique in wet steam is proposed and built. A calibration procedure is outlined using polystyrene latex spheres, but when this procedure was attempted it was found that the measurement resolution required for steam wetness fraction measurements was not obtained. A statistical analysis of data shows that further developments and study are needed to apply photomicrography to measure the wetness of steam in an LP turbine. |
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| Item Description: | Vita. "Major subject: Mechanical Engineering". |
| Physical Description: | viii, 56 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaf 52). |