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Details of Grant 

EPSRC Reference: GR/R44263/01
Title: Investigation of Silo Honking During Discharge
Principal Investigator: Ooi, Professor JY
Other Investigators:
Pankaj, Professor P Campbell, Professor DM Greated, Professor C
Researcher Co-Investigators:
Project Partners:
Braby Ltd Dupont Eastman Chemical Ltd (inc)
Jenike & Johanson Inc
Department: Infrastructure and Envronmental Res Cen
Organisation: University of Edinburgh
Scheme: Standard Research (Pre-FEC)
Starts: 01 September 2001 Ends: 28 February 2005 Value (£): 212,812
EPSRC Research Topic Classifications:
Mining & Minerals Extraction Multiphase Flow
Particle Technology
EPSRC Industrial Sector Classifications:
Manufacturing Chemicals
Pharmaceuticals and Biotechnology No relevance to Underpinning Sectors
Related Grants:
Panel History:  
Summary on Grant Application Form
Silos storing bulk solids such as PET and nylon pellets are widely used in the modern manufacturing industry. Many of these silos emit loud honking sounds during discharge. As noise pollution is becoming increasingly unacceptable, many industries are threatened with possible closure of these honking silos. Although several possible sources of excitations that cause vibration have been identified, the mechanism that causes these loud (100110 dB) high frequency sounds is not known. This project aims to establish the mechanism that causes honking and to develop predictive tools that will help in devising effective solutions. The programme will call upon the combined expertise of specialists in bulk solids handling, structural dynamics and acoustics at Edinburgh University. Acoustic measurements of silo honks and detailed observation of conditions that induce honking will first be undertaken at industrial sites where honking is known to occur (vital since no laboratory model silo has been reported to honk). Then the interaction properties of the silo wall and honking pellets will be determined using both standard and novel laboratory tests, and compared with non-honking pellets. Finite element method will be used in conjunction with the experiments. A physical laboratory model will be designed to explore and demonstrate the fundamental mechanism that causes honking. Finally the project aims to make design recommendations to eliminate honking.
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Organisation Website: http://www.ed.ac.uk