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Assessment of the Propeller Tunnels on the Coast Guard's Heritage Class Patrol Boat

K. J. Colella / J. Q. Ashburn

The purpose of the study is to examine flow characteristics through the propeller tunnel of the Coast Guard's Heritage Class Patrol Boat. Of particular interest is the possibility of separation along the tunnel roof, and pressure recovery at the tunnel exit. Two tunnel configurations were examined and compared. Results indicate that separation is highly unlikely at the tunnel entrance for both a rounded entrance and square entrance configuration. Pressure recovery characteristics for the square entrance tunnel with a downward exit slope proved to be more favorable than the rounded tunnel. Findings of the study are in agreement with cited literature.

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Assessment of the Propeller Tunnels on the Coast Guard's Heritage Class Patrol Boat

K. J. Colella / J. Q. Ashburn

The purpose of the study is to examine flow characteristics through the propeller tunnel of the Coast Guard's Heritage Class Patrol Boat. Of particular interest is the possibility of separation along the tunnel roof, and pressure recovery at the tunnel exit. Two tunnel configurations were examined and compared. Results indicate that separation is highly unlikely at the tunnel entrance for both a rounded entrance and square entrance configuration. Pressure recovery characteristics for the square entrance tunnel with a downward exit slope proved to be more favorable than the rounded tunnel. Findings of the study are in agreement with cited literature.

Assessment of the Propeller Tunnels on the Coast Guard's Heritage Class Patrol Boat

K. J. Colella / J. Q. Ashburn

The purpose of the study is to examine flow characteristics through the propeller tunnel of the Coast Guard's Heritage Class Patrol Boat. Of particular interest is the possibility of separation along the tunnel roof, and pressure recovery at the tunnel exit. Two tunnel configurations were examined and compared. Results indicate that separation is highly unlikely at the tunnel entrance for both a rounded entrance and square entrance configuration. Pressure recovery characteristics for the square entrance tunnel with a downward exit slope proved to be more favorable than the rounded tunnel. Findings of the study are in agreement with cited literature.

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Titel:

Assessment of the Propeller Tunnels on the Coast Guard's Heritage Class Patrol Boat

Beteiligte:

K. J. Colella (Autor:in) / J. Q. Ashburn (Autor:in)

Erscheinungsdatum:

1992

Format / Umfang:

26 pages

Medientyp:

Report

Format:

Keine Angabe

Sprache:

Englisch

Schlagwörter:

Marine Engineering , Fluid Mechanics , Laboratory & Test Facility Design & Operation , Marine propellers , Hydraulic test tunnels , Hydrodynamics , Calibration , Boats , Velocity measurement , Pressure measurement , Test facilities , Computerized simulation , Heritage class patrol boats

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