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A vena contracta is point in flow where a jet of fluid is narrowest. It's not 'governed' by any measurable boundry. Was after an analytical solution.

Hi. Does anybody know how to find the diameter of a Vena Contracta in orifice plates in gas/vapour flows?

Thanks both. stanier, you wouldn't happen to have a link to the software your talking about? can't seem to find it..

I don't think you've understodd the query. Your describing a multi-stage orifice meter. My query is with regards to a single plate with many orifices. My project aims to determine noise generated by orifice plates. My knowledge of acoustics is limited but I've heard it said repeatedly that these...

Im currently working on a project regarding noise in orifice plates. I've seen it mentioned in several places that a multiple orifice orifice plate is quieter than a single orifice orifice plate of the same overall orifice area. Does anyone know WHY this is is the case?

Hi. In most flow measurement engineering handbooks these are refered to as flow conditioners. The one you've described is a tube bundle flow conditioner. There usually used to prevent swirl and restore flow profiles. In your case it seems you've implemented them as a crude multi-stage orifice...

My employer has asked me to design a piece of software capable of calculating noise (in decibels) in orifice flow meters. I have noticed a few companies have comprised programs that evaluate a value of noise in throttling valves. Obviously initial pressure drops when a valve is opened cause...

My employer has asked me to design a piece of software capable of calculating noise (in decibels) in orifice flow meters. I have noticed a few companies have comprised programs that evaluate a value of noise in throttling valves. Obviously initial pressure drops when a valve is opened cause...