Emerson Cavitation Tunnel

Emerson Cavitation Tunnel
The Main Boiler House, home to the Emerson Cavitation Tunnel
General information
Type	Educational
Location	Newcastle upon Tyne, United Kingdom
Coordinates	54°58′45″N 1°36′56″W / 54.979107°N 1.615632°W / 54.979107; -1.615632Coordinates: 54°58′45″N 1°36′56″W / 54.979107°N 1.615632°W / 54.979107; -1.615632
Completed	1949
Owner	Newcastle University

The Emerson Cavitation Tunnel is a propeller testing facility based in the department of Marine Science and Technology at Newcastle University. It is currently the third largest cavitation tunnel in the UK, after those owned by the Ministry of Defence at Haslar, and the University of Liverpool's School of Engineering, respectively.

Capabilities

The Emerson Cavitation Tunnel consists of a water circuit which flows in the vertical plane, within which propellers and other propulsion devices can be tested. The system is powered by a 300 kW (400 hp) pump, with a four-bladed impeller and can produce a maximum water velocity of 15.5 knots (28.7 km/h; 17.8 mph). The test area has a cross sectional area of 0.99 m² (10.7 sq ft) allowing model propellers of up to 40 cm (16 in) in diameter to be tested. The pressure range of the tunnel can vary from a minimum of 7.6 kN/m² to a maximum of 106 kN/m². Cavitation numbers of 0.5 (minimum) to 23 (maximum) can be accommodated for. Measurements can be taken using a 3 Watt, water-cooled, Argon-ion laser, a hydrophone, and two dynamometers. A high-speed video camera is also attached with an imaging frequency of 0–50 frames per second.

Funding for the tunnel's equipment is raised by numerous organisations, including the Engineering and Physical Sciences Research Council (EPSRC) and the Scottish Universities of Glasgow and Strathclyde.

History

The tunnel was first established at the University in 1949 after being disassembled and transported from Pelzerhaken, Germany after the Second World War. The tunnel arrived at the University in 1947 and over the following few years the tunnel was heavily modified. The tunnel - which was originally designed to be operated in the horizontal plane - was converted into a vertical loop tunnel and the length was reduced by half. The original observation window was modified and two more added. Because of damage, a new impeller was constructed and numerous pieces of measuring equipment were added. This equipment included pitot tubes, a tachometer, stroboscopic lighting equipment, contact meters and a vacuum pump. The tunnel was connected to an electrical supply in 1949 and entered service late in 1950, after technical problems called for recalibration of some of the instruments. The Cavitation Tunnel is still housed in Newcastle University's old boiler house, where it was originally reconstructed.

The first research grant of £8,000 was awarded in 1950 for the testing of a new series of propellers, and was awarded by the Department of Scientific and Industrial Research (DSIR).

In the 1970s and 1980s, the tunnel was extensively modified and upgraded in order to improve the range of propellers that could be tested. The tunnel was also renamed to its current name, the Emerson Cavitation Tunnel after Dr Arnold Emerson, who was the tunnel superintendent and the driving force behind the upgrades.

Since the upgrades of the 1980s, few other modifications have been made to the tunnel itself. New computer-based data collection, interpretation and analysis technology has been added to aid with computational fluid dynamics. Data is also collected with the help of laser doppler anemometry (LDA) and phase doppler anemometry (PDA).

Location

The cavitation tunnel is located on King's Road in the middle of the University's city centre campus between the Armstrong building, the Student Union, the Arches and the Bedson building. it had been adjacent to the Museum of Antiquities prior to its demolition.

The tunnel is planned to be relocated to Blyth, approximately 13 miles way, as part of plans to refurbish the Main Boiler Room at the University. During the time of its relocation the tunnel will be completely out of use, but is estimated to be available for use again in 2017.^[1]

References

↑ http://thecourieronline.co.uk/research-tunnel-moving-to-blyth-to-make-way-for-new-social-space/

Emerson Cavitation Tunnel at Inter-Agency Committee on Marine Science and Technology (Marine.gov.uk) at the Wayback Machine (archived February 16, 2012)

External links

Emerson Cavitation Tunnel website at Newcastle University
Department of Marine Science and Technology at Newcastle University

Newcastle University

People	Chancellor: Sir Liam Donaldson Vice-Chancellor: Professor Chris Brink List of Newcastle University people

Faculties	Humanities and Social Sciences (HaSS) Medical Sciences Science, Agriculture and Engineering (SAgE)

Student Life	Boat Club (NUBC) Boat Race Contemporary Music Ensemble (NUCME) Marine Science and Technology Society (Wetsoc) Newcastle Wildcats Northumbrian Universities Royal Navy Unit Stan Calvert Cup

Museums	Centre for Life Great North Museum Hancock Museum Hatton Gallery Museum of Antiquities Shefton Museum

Facilities and research	Centre for Software Reliability Culture Lab Dove Marine Laboratory E. G. West Centre Emerson Cavitation Tunnel Global Urban Research Unit (GURU) RV Bernicia School of Dental Sciences University Library

Miscellaneous	History of Durham University Moorbank Botanic Gardens Northern Stage

Category Commons

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