Two-Phase Flow Phenomena in Gas Turbine Compressors with a Focus on Experimental Investigation of Trailing Edge Disintegration

Two-phase flow in gas turbine compressors occurs, for example, at heavy rain flight condition or at high-fogging in stationary gas turbines. The liquid dynamic processes are independent of the application. An overview on the processes and their approach in literature is given. The focus of this study lies on the experimental investigation of the trailing edge disintegration. In the experiments, shadowgraphy is used to observe the disintegration of a single liquid rivulet with constant liquid mass flow rate at the edge of a thin plate at different air flow velocities. A two side view enables calculating droplet characteristics with high accuracy. The results show the asymptotic behavior of the ejected mean droplet diameters and the disintegration period. Furthermore, it gives a detailed insight into the droplet diameter distribution and the spreading of the droplets perpendicular to the air flow.

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Experimental Investigation on Two-Phase Flow Distribution in Multi-Channel Manifold With Two Radial Inlets

Volume 3: Thermal Hydraulics; Current Advanced Reactors: Plant Design, Construction, Workforce and Public Acceptance ◽

10.1115/icone17-75995 ◽

2009 ◽

Author(s):

Liping Pang ◽

Baomin Sun ◽

Bo Wang

Keyword(s):

Experimental Investigation ◽

Water Flow ◽

Significant Variation ◽

Two Phase Flow ◽

Air Flow ◽

Flow Distribution ◽

Phase Flow ◽

Two Phase ◽

Parallel Channels ◽

Inlet Conditions

An experimental investigation was conducted to study the two-phase flow distributions in a horizontal cylindrical manifold with two radial inlets and 11 parallel channels. The effects of the different inlet conditions on two-phase flow distribution of parallel channels in the manifold were investigated. The flow rates of air and water in 11 channels were measured under symmetrical and unsymmetrical inlet conditions. Experimental results show that the air and water flow distributions of manifold at channels keep a stable flow ratio when two radial inlet conditions keep symmetrical. Water flow distribution has a significant variation and air flow distribution has a small change when two radial inlet conditions keep unsymmetrical and water superficial velocity increases at right inlet. Water and air flow distribution has a significant variation when two radial inlet conditions keep unsymmetrical and air superficial velocity decreases.

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Visualization of Entrainment and Surface Behavior of High Speed Air Jet Blowing Out From a Hole to Stagnant Water

Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles ◽

10.1115/icone20-power2012-55068 ◽

2012 ◽

Author(s):

Kohei Nago ◽

Yasuo Koizumi ◽

Akihiro Uchibori ◽

Hiroyuki Ohshima

Keyword(s):

High Speed ◽

Two Phase Flow ◽

Droplet Diameter ◽

Video Camera ◽

Diameter Distribution ◽

Phase Flow ◽

Stagnant Water ◽

Two Phase ◽

Air Jet ◽

Jet Blowing

A two dimensional air jet was blown out from a nozzle into water in a thin vessel. The behavior of the interface between water and the air jet and also the air jet were recorded with a high speed video camera. Filament-like ears and wisps pulled-out from the wavy water surface were noticed in the recorded photos. Droplets are formed from these. Droplet diameters were obtained from the recorded photos. As the air velocity increased, the number of droplets created by the air jet increased lineally and the smaller droplets increased. The correlation for the droplet diameter distribution developed for the annular dispersed two-phase flow in a pipe predicted well the present results. The correlations for the droplet diameter developed for the annular dispersed two-phase flow in a pipe and for the jet blowing out from the stagnant water pool considerably underpredict the experimental results.

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