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https://hdl.handle.net/2440/58156
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DC Field | Value | Language |
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dc.contributor.author | Lanspeary, P. | - |
dc.contributor.author | Lee, S. | - |
dc.contributor.editor | Morgan, R. | - |
dc.contributor.editor | Lemckert, C. | - |
dc.date.issued | 2007 | - |
dc.identifier.citation | Proceedings of the 16th Australasian Fluid Mechanics Conference / P. Jacobs, T. McIntyre, M. Cleary, D. Buttsworth, D. Mee, R. Clements, R. Morgan, C. Lemckert (eds.), 3-7 December 2007: pp.443-446. | - |
dc.identifier.isbn | 9781864998948 | - |
dc.identifier.uri | http://hdl.handle.net/2440/58156 | - |
dc.description.abstract | A nozzle consisting of a circular inlet orifice and a short chamber with an exit lip can produce a naturally oscillating jet flow if the expansion ratio from inlet to chamber (D/d1) is larger than five. As an industrial natural-gas burner, the device offers advantages over simple nozzles of equivalent capacity. However, its usefulness as a pulverised solid-fuel burner is constrained because it requires a high supply pressure. This is due to the high energy-loss coefficient of the inlet expansion ratio, D/d1. If an equilateral-triangular inlet replaces the circular inlet, oscillating flow occurs at equivalent expansion ratios as low as D/d1¼2, and the supply pressure is much lower. An engineering model of the loss coefficient is obtained from measurements of supply pressure over a wide range of nozzle geometries. To begin, we split the overall loss coefficient K into three components, one for each of the inlet oriffice, chamber and exit lip. A formula representing each component of K is then determined from dimensional analysis, inspection of the data, and least-squares curve fitting. Combining these component formulae gives K as a function of four geometric parameters and seven numerical coefficients. When the numerical coefficients are optimised simultaneously, the r.m.s. difference between the model and the data is 2.2%. | - |
dc.description.statementofresponsibility | P. V. Lanspeary and S. K. Lee | - |
dc.description.uri | http://espace.library.uq.edu.au/view.php?pid=UQ:120833 | - |
dc.language.iso | en | - |
dc.publisher | University of Queensland | - |
dc.rights | Copyright status unknown | - |
dc.title | Engineering formula for pressure loss in an oscillating-triangular-jet nozzle | - |
dc.type | Conference paper | - |
dc.contributor.conference | Australasian Fluid Mechanics Conference (16th : 2007 : Gold Coast, Australia) | - |
dc.publisher.place | CDROM | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest Mechanical Engineering conference papers |
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