Questions tagged [turbomachinery]
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60 questions
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Find the axial velocity of an axial turbine has a reaction ratio R = 1/2. [Principles of turbomachinery 5.7]
I'm currenty doing a course in trubomachinery at the university were I've got stuck on the following question: An axial turbine has a reaction ratio $R =\frac{1}{2}.$ Air enters the rotor with ...
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Building a small scale Gravitational Water Vortex Hydro Turbine
I need some help for my thesis project, so i have my dimensions for my basin and kind of my blades but how would i measure the torque on the blade axle to get efficiency without breaking my budget? ...
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Cartesian to blade to blade plane angle transformation
I am working on an input routine to create the file necessary to execute an analysis with the MTFLOW (Multi-element Through FLOW) solver by Mark Drela at MIT. I already have an existing (ducted) ...
user62481
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31 views
Magnitude of axial force in axial turbine with respect to input force
In an axial turbine, the input force can be decomposed into several components: axial, tangential, radial, drag, and lift. These forces can be categorized based on their directions in a 3D space. ...
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REFPROP 9 - Possible irregularities in organic fluid state properties
I am currently designing a Organic Rankine cycle-based turbine with Toluene at its working fluid. At the beginning of the expansion the fluid pressure $p_0$ is 2 MPa and temperature $T_0$ is 550 K. ...
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1 vote
1 answer
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How Dump Tubes (arrangement with lot of perforation) reduces the pressure of Steam flow. How to derive a scientific basis of designing a dump tube
Recently I have come across simple yet intriguing device - The steam dump pipe with multiple perforations (orifices). The dump pipe is typically used to reduce the steam flow pressure. The inlet steam ...
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Technical names for microturbine designs
When talking about microturbines, I would call a "usual design" a centrifugal pump and a centrifugal turbine facing away from each other and on the same shaft. In contrast to such "...
user50793
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64 views
How to determine wedge angles, stagger angles, pitch, and chord for axial turbine mean-line modelling?
I would like to measure the performance and optimize the design of an axial turbine using mean-line modelling. However, most of the optimization codes I found on GitHub require wedge angles, stagger ...
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1 answer
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How many turbos is too many? logistically and physically speaking
I want to build an engine simply to create as much horsepower as possible; Not necessarily to put into a car, just to have a fun project that is powerful. so of course I'm trying to max out all the ...
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0 votes
2 answers
47 views
Dual-independent turbo engine possibilities
My coach wants to mod his engine, so I was throwing around the idea of possible turbo setups. One that I started to like the idea of was the idea of two turbos, working independently. Is it possible ...
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1 vote
2 answers
256 views
Dixon/Hall's "Fluid Mechanics and Thermodynamics of Turbomachinery" full of errors?
Note: This is no homework, but self-study. I have a thermodynamics and fluid mechanics background and am trying to work through this book in order to get better understanding of turbomachines (...
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Centrifugal Compressor selection
I am currently trying to select a centrifugal compressor for a wind tunnel project. The requirement is that the flow velocity in the test section is Ma 0.1. The geometry of the wind tunnel has already ...
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1 vote
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88 views
Aerodynamic design and characteristic of fan vs blower
I just learnt about the difference between a fan and a blower, namely the former providing high flow rate at very low outlet pressure (<1.1*inlet) and the latter providing a slightly increased ...
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63 views
Kindly explain this graph which is related to internal combustion engines
Hello, I am not getting this graph which is related to the Internal Combustion Engine.
0 votes
1 answer
58 views
Why does flow capacity of axial turbine decreases with increasing RMP?
when studying the compressor map and the turbine map of a gas turbine, I noticed that the flow capacity of the compressor increases with speed increase (RPM) and the flow capacity of the turbine ...
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