Many thanks, you gave me answers for my question.
Sadly I understand that I have a big lack of knowledge, things studied and then forgotten...
I will try to fill these voids.
Ok, I keep reasoning, fuel entrance and consequent burning give the fluid great energy: how this energy is stored? what parameter does this energy change? It's not pressure because it remains constant, is it velocity? I am not sure because the enlargement of the cross-section slows down the...
Thanks guys... so do you confirm that during combustion the chamber cross-section area increases?
Link very interesting, I read brayton cycle on wikipedia but not the combustor...
On that link cross-section area seems to reduce after burning.
Hi everybody, my question is very simple, I think but I can't have a point on it:
in brayton cycle there's the isobar step, during the combustion process... everywhere I read that this step is isobar, but I am guessing how can it be isobar if temperature of the gas rises because of combustion...
Many thanks for the answers, I need a comment on this sentence "then it arrives at the outlet section and it suddenly goes from 5 - (all the p.drops)to 1 atm. All the pressure energy transforms in velocity." that I wrote inmy post. Is it right??
Getting into the details of an example, let's say that I have after valve discharge a straight pipe, an elbow and than it goes up vertical to atmosphere. Let's say valve discharges at 500 KPa (5 ATM). If I understood well, pressure in the vent pipe goes from 5 atm to 1 atm. There's the elbow...
Hi everybody, how does pressure varies in the vent pipe connected to a PSV? I think it should go from the opening pressure of the valve to 1 ATM or 100 KPa (atmospheric pressure). If I am right is this variation linear during the lenght of the pipe? Does it happen suddenly at the open side of...
Hi, I perform stress calculations using Coade Caesar II. I noticed that in sustained cases allowables undergo variations (they diminish) at the points with SIF (stress intensification factor). Though I can understand why I cannot find a B31.3 formula or paragraph that justifies this behaviour...
Hi, I have noticed that water lines in the oil plant I am surveying have valves and sometimes lines are made of various materials, above all bronze and cast iron, sometimes steel.
Could you explain how to choose one or another material and the criterions?
Lines are cooling water, raw water...
Hi everybody, I found that in most cases these kind of valves have an outlet with littler flange rating and bigger diameter than the inlet, I ask you why. Maybe the rating is for the pressure reduction but I really can't explain the bigger diameter.
Many thanks
If a fluid changes diameter passing through a reducer, let's say from 10" to 8" what happens in terms or pressure?
Excuse me for the silly question but in the office someone made doubts arise.
As I wrote in the subject I would like to know what's the function of reducers in a by-pass, I attach a little picture to clarify things, I hope you will answer me, many thanks.
Many thanks, I already took a reading on the article Gator suggested.
BillBirch, I said it is an art because I have to represent reality, and many times it's difficult to represent it on a drawing, many times, after 30 years the plant is very different from how it was at the beginning, (luckily...
But what if I talk about structures...
If I take the distance on the basements I think that temperature and load doesn't matter, I think it's a mistake during the construction phase, should I care about it or not?
Ok, thanks, in this case the problems arise when the steel is a little bit bent, usually I give the distance at the basements, I never surveyed off-shore but for pipe-rack steel columns I find distances are never the same as designed, I can find 4005, 4003, 4012, 3088, as an end user do you want...
