# What is Centrifugal compressor: Definition and 13 Discussions

Centrifugal compressors, sometimes called radial compressors, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery.They achieve a pressure rise by adding kinetic energy/velocity to a continuous flow of fluid through the rotor or impeller. This kinetic energy is then converted to an increase in potential energy/static pressure by slowing the flow through a diffuser. The pressure rise in the impeller is in most cases almost equal to the rise in the diffuser.

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1. ### Centrifugal Compressor: Absolute Velocity Calculation

How can I calculate the absolute velocity of air at the outlet of a centrifugal compressor if I have: Diameter of impeller RPM Slip factor I've been reading for weeks and cannot seem to find the answer to this question. For anyone who is familiar with the subject, I'm sure you know about the...
2. ### Calculating parameters of centrifugal compressor

I'm having a difficult time understanding Euler's turbine equation as it relates to designing a centrifugal air compressor. I need to calculate the impeller size if I know the inlet pressure, outlet pressure, rpm, and mass flow rate. The velocity triangles and definitions have me confused...
3. ### Measuring the total pressure of a centrifugal compressor

Hello everyone, Nowadays I am planning to redesign my centrifugal compressor which I designed for a subsystem in my graduation project. It's a 3D printed and brushless motor driven centrifugal compressor and its about a hand size. However, due to its relatively small size and relatively low RPM...
4. ### How pressure increases in centrifugal compressor?

I have read this in my textbook about principles of operation of centrifugal compressor: "The impeller is rotated at high speed by the turbine and air is continuously induced into the center of the impeller. Centrifugal action causes it to flow radially outwards along the vanes to the impeller...
5. ### HVAC How to know if a blower will be able to overcome system resistance?

The rectangular chamber contains inclined perforated plates through which the air passes. At the top there is a blower and at the front as well as back bottom there are openings for air inlet. How do I calculate system resistance and know if a certain blower will be able to overcome it?
6. ### Auto/Motor Centrifugal compressor lift aircraft -- engineering help please

Hello, I have a design for a different type of aircraft. I wanted an actual engineer to give advice before I fork over for some parts to try and make a working model. Attached are some pics. some of the pics are as if it were a full size acft. But for the model I was just going to use two turbo...
7. ### How mass flow and pressure ratio is related in case of a Gas Turbine

Hi, As per my observation and experience, when we use evaporative cooler to cool the inlet air to the gas turbine, the compressor discharge pressure (i.e PCD or P3) rises. As, the temp. of the inlet air drops and the mass flow increases due to the increase in density, I believe the discharge...
8. ### Centrifugal compressor with relief valve formulas

Hi folks, I have a question regarding centrifugal compressors when a relief valve is included in the system. Allow me to explain... There is a centrifugal compressor supplying air to an aircraft engine. As altitude varies, the compressor provides enough pressure up to altitude "X" for the...
9. ### Centrifugal Compressor Performance Curve

Hi I have uploaded centrifugal compressor performance curve. I want to know how Mass Flow vs Pressure Ratio curve plotted under different efficiency since efficiency is a constant for a compressor. Please help.
10. ### Are all centrifugal compressor big ?

Hi, i'm comparing differents types of compressor to find out which one I'm going to convert into a turbine for my rankine cycle projet. And I'm wondering : are centrifugal compressors only for big power because the smallest i can find is 50 hp (which is the smallest turbo of garrett). I'm...
11. ### Sources for Centrifugal Compressor design

I would like sources for centrifugal compressor design. Anything, such as books, e-books, journals, websites, etc. will do.
12. ### Centrifugal Compressor: Converting Kinetic to Pressure Energy

in the centrifugal compressor the function of the volute or the diffuser to convert kinetic energy into pressure energy my question is isn't it bernouuli equation??and we can apply bernouuli equation to incompressible fluid?? also wouldn't that cause an exapnsion to fluid which causes reduction...
13. ### Thermodynamics Question (Centrifugal Compressor)

Hi there guys, Sorryto make my first post on here a request, but i am a little puzzled at the moment by this latest question I have been set! My lecture notes do not seem to cover this in any detail at all, and resources on the internet are either avoiding me or i am just plain blind! 1...