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CAVITATION JET PERFORMANCE ESTIMATION SYSTEM

外国特許コード F140007809
整理番号 S2013-1145-N0
掲載日 2014年1月8日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2013JP053678
国際公開番号 WO 2013125463
国際出願日 平成25年2月15日(2013.2.15)
国際公開日 平成25年8月29日(2013.8.29)
優先権データ
  • 特願2012-038047 (2012.2.23) JP
発明の名称 (英語) CAVITATION JET PERFORMANCE ESTIMATION SYSTEM
発明の概要(英語) The present invention sets formula (1) for calculating an estimated cavitation jet performance (E). On the basis of data pertaining to a jet pressure (p1), a nozzle diameter (d) and a cavitation number (σ), and data pertaining to a cavitation jet performance (ERmax) for such data, the present invention specifies, in formula (1), the power index n(σ) of the term Xn(σ) pertaining to the power law of the jet pressure (p1) of the cavitation jet, and the power index m(σ) of the term Ym(σ) pertaining to the power law of the nozzle diameter (d) generating the cavitation jet. The present invention finds the estimated cavitation jet performance (E) using the above data pertaining to the jet pressure (p1), the nozzle diameter (d) and the cavitation number (σ), as well as formula (1) and the functions n(σ) and m(σ) for the specified power indices.
従来技術、競合技術の概要(英語) BACKGROUND ART
A high-speed water jets water injected with cavitation bubbles cavitation jet can be obtained, (CP) , surface modification of metal material, and the cleaning apparatus, a chemical reaction processing or the like are used.
In this way, by the cavitation jet and, by surface modification of metal material, cleaning, or a chemical reaction and the like of the processing ability, the ability of the cavitation jet (hereinafter, 'the ability of the cavitation jet' may be referred to) is called.
Such cavitation jet performance, the injection pressure of the cavitation jet (nozzle upstream-side pressure), bubble collapse field and the shape of a nozzle (nozzle downstream pressure) the pressure (the size of the device) and the like, by hydrodynamic cavitation jet parameters are known to differ significantly.
For example, in , collapse of the cavitation bubbles caused by the impact processing is performed, only the injection pressure of the cavitation jet flow rate or even increase, as well as cavitation jet does not increase the ability, in some cases reduced.
In addition, certain flow rate even under the condition that the dimension of the growth time of the cavitation bubbles if a large increase in the development of cavitation bubbles is, as a result of the impact of bubble collapse large and the energy, cavitation jet performance is increased.
Furthermore, the size of the cavitation erosion is generally proportional to the square of the fluid device 3 and the erosion becomes large although the power law of the erosion is known, details are unknown. In addition, flow rate and power law, for the exponent, the cavitation strength is proportional to the energy of the flow if the exponent becomes 3, the exponent is 4-11 have been reported and widely varied, and the detail is uncertain.
For this reason, conventionally, high-efficiency cavitation jet use or carry out, using a cavitation jet cavitation jet generating device design and fabrication of a case in which, the target estimation using a cavitation jet flow generating apparatus, or for estimation of the trial model machine made, by performing an actual test, to estimate the ability of the cavitation jet has been carried out.
Such as a cavitation jet performance of the estimation method, using an impact force measuring sensor is a method for estimating the impact of cavitation has been proposed (see Patent Document 1). This is in fact a putative target cavitation jet generating device is used, each of the conditions (nozzle upstream pressure, downstream pressure nozzle, the nozzle diameter) of the impact force actually required to perform a measurement.
As another estimating method, estimation of the actual target of the fluid machine using a simulated model of the fluid machine, the cavitation strength of the fluid machine model are determined. The actual machine and the fluid model of the machine body size by using the similarity, the actual method of calculating the cavitation strength of the fluid machinery is proposed (see Patent Document 2) are. In addition, by using the supercomputer by performing a simulation of cavitation jet, attempt to predict the ability of the cavitation jet has been made.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • TOHOKU UNIVERSITY
  • 発明者(英語)
  • SOYAMA, Hitoshi
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IS JP KE KG KM KN KP KR KZ LA LC LK LR LS LT LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG
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