Welcome to the Ozen Engineering Vlog
In this video, we will discuss the design of a centrifugal compressor. As mentioned previously, BANTESYS provides a set of tools called Turbo System, which assists engineers in designing and analyzing any turbo machinery component.
Project Initialization
We begin our project by dragging a Vista CCD module, which is specifically for a centrifugal compressor. Then, we double-click on blade design to specify our duty point or best efficiency point.
Design Specifications
- Overall pressure ratio: 2
- Mass flow rate: Constant
- Rotational speed: 40,000 RPM
- Working fluid: Air
- Correlation method: Casey Robinson
Gas Properties
We will use air as an ideal gas for this design.
Geometry Configuration
- Hub diameter: 32 millimeters
- Vane count: 6
- Splitter blades/inter vanes: 6
- Tip clearance at shroud: 0.5 millimeters
Calculation and Performance Analysis
After defining the operating point, air properties, and basic geometry, we proceed to calculate the basic design and key performance numbers.
- Input verification: 40,000 RPM total pressure ratio
- Efficiency: Over 80%
We can further verify the design by generating an efficiency plot. Our point is represented by a square, and it is close to the curve, indicating a feasible design.
Performance Mapping
We can quickly generate a performance map using the function. This tool allows us to explore different design conditions.
- Examine five different speeds ranging from 10,000 to 50,000 RPM
- Calculate pressure ratio versus mass flow
- The blue curve represents our design curve at 40,000 RPM
Additionally, we can assess the impact of pressure and inlet temperature using this tool.
Title: Centrifugal Compressor Design with Ansys TurboSystem - Part 1 Welcome. We're going to talk about the design of a centrifugal compressor in this OZON Engineering vlog.
As we've discussed before, BANTSYS provides a set of tools called Turbo System, which helps engineers design and analyze any turbo machinery component. Let's start our project by dragging a Vista CCD module, which is for a centrifugal compressor, and then double-click on blade design.
Here, we're going to specify our duty point or best efficiency point. So let's have an overall pressure ratio of two, keep the mass flow rate the same, at 40,000 RPM, it's going to use air as the working fluid. And we're going to use the Casey Robinson correlations.
We're not going to make any more changes in this tab. Next tab is gas properties. As mentioned, it's going to be an ideal gas and air. We move on to geometry. Let's make our impeller diameter 32 millimeters. And reduce our vane count to six.
We're going to have splitter blades or inter vanes of the same count. We also would like to have a tip clearance at the shroud of half a millimeter. Once we define the operating point, the air properties or the fluid properties, and then the basics of the geometry, we're going to hit calculate.
This will come up with a basic design and calculate key performance numbers. Here, we can check our inputs: 40,000 RPM, total pressure ratio, and now we can see our efficiency over 80%. To further check that, we can do an efficiency plot.
Our point is over here with the square, and it is close to the curve, so it seems like this is a feasible design. We can move on to the next stage, where we can quickly do a performance map using the function. This is a quick calculator that will give us what happens at different design conditions.
For example, let's look at five different speeds and do 10,000 to 50,000 RPM. If we do a calculate, it's going to provide us with our pressure ratio versus mass flow, and the blue curve is our design curve at 40,000 RPM. We can also look at pressure and inlet temperature impacts using this tool.
