What is Turbomachinery: Definition and 15 Discussions

Turbomachinery, in mechanical engineering, describes machines that transfer energy between a rotor and a fluid, including both turbines and compressors. While a turbine transfers energy from a fluid to a rotor, a compressor transfers energy from a rotor to a fluid.These two types of machines are governed by the same basic relationships including Newton's second Law of Motion and Euler's pump and turbine equation for compressible fluids. Centrifugal pumps are also turbomachines that transfer energy from a rotor to a fluid, usually a liquid, while turbines and compressors usually work with a gas.

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  1. S

    Confusion about energy conversion mechanisms in gas turbines

    Hello Gents, I am very confused about the working principle of gas turbines. I understand that air is first compressed in a compressor to obtain high pressure air at the inlet of turbine, but before air is introduced to the turbine, first it has to be heated to very high temperatures through...
  2. SebastianRM

    Cannot understand author fully - Turbomachines

    I am reading a book of Fundamental Energy Systems. The author describes the rate of change in head for a turbomachine as: $$ \frac{1}{2}[(V_1^2-V_2^2)+(U_1^2-U_2^2)+(V_{R2}^2-V_{R1}^2)] = H =U_1V_{u1} - U_2V_{u2} $$ and the static effect as: $$SE =(U_1^2-U_2^2)+(V_{R2}^2-V_{R1}^2) $$ However...
  3. W

    Capture and re-use the heat generated from Air Compression

    I am trying to fill pipes with a volume of 556 cuft to 15,000 psi. I want to capture and re-use the heat generated from the compression process and re-use it. Is this amount of compression and heat exchanging possible with current technology
  4. Chincha40

    Ljungström turbine, general info?

    I'm currently building a turbo-shaft engine and I am trying to find a good, yet simple to build free power turbine for extracting the exhaust energy of the jet engine. The Ljungström turbine seems promising as it is compact and easily machined from a 3 axis cnc machine. Does anyone know of the...
  5. J

    Schools Graduate Schools that do Turbomachinery Research

    Hi, I have a Bachelors in Aeronautical Engineering and am looking forward to getting a Masters Degree in Engineering. But the catch is that I have not been able to find schools that conduct the research I am interested in. I am particularly interested in Gas Turbine Research, specifically...
  6. M

    Some fundamental questions on turbomachinery

    I try to understand topic of turbomachinery. Would someone like to make some guidance? In that page I cannot understand some parts. 1) What does it mean by "above two conditions" in "Viscous effects must unfortunately be neglected, as it is generally impossible to satisfy the above two...
  7. navierstokes

    Control Systems of Turbomachinery?

    I'm a sophomore of Mechanical Engineering, but I do like delving into more advanced subjects that I haven't seen in undergrad yet, and among those are fluid dynamics. I've made a little bit of research into turbomachinery (while looking for some classes that could interest me hereafter) and...
  8. MacLaddy

    Turbomachinery velocity triangle problem

    Homework Statement Air (assumed incompressible) flows across the rotor shown in the figure such that the magnitude of the absolute velocity increases from 15 m/s to 25 m/s. Measurements indicate that the absolute velocity at the inlet is in the direction shown. Determine the direction of the...
  9. N

    Stator inlet angle in turbomachine?

    Hello, I am wondering about the following action in a stator: If the inlet angle in a stator is B, and the outlet angle is -B, what exactly is happening? Axial vlocity should be constant, and so should the relative velocities except being mirrored and i am asuming infinitely thin blades.. Can...
  10. S

    Turbomachinery: number of stages and power of steam turbine

    Please help! Steam turbine. Given parameters: turbine speed, steam flow, steam inlet and outlet pressures, nozzle and blade velocity coefficients, blade angles and blade velocity. I can find all efficiencies. How could I calculate number of stages required and the actual power produced?
  11. M

    Where Can I Find Resources for Solving Turbomachinery Exam Questions?

    Homework Statement No attempt done, just looking for any books or online sites that could help in solving these. They're likely to come up in my exam and am studying for other exams at the min.
  12. Saladsamurai

    Turbomachinery: A first text ?

    Can anyone recommend a good introductory text? I have studied Fluids, Thermodynamics, Heat Transfer, and Math methods at graduate level. I am in the Aerospace industry if that affects responses. Thanks!
  13. A

    Concepts of turbomachinery

    iam confused so much about some concepts of turbomachinery. according to the classification of rotodynamics devices there are 3 types radial flow,axial flow and mixed flow and axial flow gives higher flow rate compared to radial flow and lower head. so my question is what is meant that axial...
  14. M

    High Performance Sealing Options (Turbomachinery)

    Let's say you have a turbojet shaft that needs sealed. Temperatures and pressures are very high (very). Now let's assume that you don't know squat about seals. Aside from brush and labby seals, what other sealing options exist that can operate at extremely high pressures/temperatures (and...
  15. H

    What is the role of blade velocity in Pelton wheel turbines?

    Hi all! I am learning things about turbomachinery, starting with the Pelton Wheel. The analysis of seems to be straighforward, but I still have some questions. I refer to this website: http://www.du.edu/~jcalvert/tech/fluids/turbine.htm There is a blade velocity u. I would like to know...
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