Generating Performance Curve of a turbine

In summary, the performance curve of a turbine is generated through tests and experiments, using parameters such as pressure, temperature, and flow rate. These parameters are measured to plot the curve, which shows the relationship between efficiency and operating conditions. The performance curve is important in selecting and improving the efficiency of a turbine, but it may have limitations such as being based on ideal conditions and not accounting for wear and tear. Regular updates and recalibration are necessary to ensure accuracy.
  • #1
Rahul Mohan P
21
0
Hi
I have data for a two wheel bootstarp air cycle machine used in aircraft environmental control system for air-conditioning under working conditions. The data available (ie mass flow rate, pressure, temperature of bleed air) is for different flight conditions, different altitudes, different temperature and pressure. I want generate corrected mass flow rate vs pressure ratio curve of the turbine used in the system. I don't have the standard data noted at STP (standard pressure and temperature) conditions, and no manufacture provided performance curve, but can I generate a curve using the available values which is not taken under STP conditions. Please Help.
 
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  • #2
Yes, it is possible to generate a corrected mass flow rate vs pressure ratio curve for the turbine using the available values that are not taken under STP conditions. This can be done by using a pressure ratio and temperature correction factor to convert the available data from the non-STP conditions to the STP conditions. The pressure ratio correction factor is calculated using the ideal gas law, while the temperature correction factor is calculated using the specific heat capacity of air. Once these correction factors are applied, the corrected mass flow rate vs pressure ratio curve can be generated from the corrected data.
 

1) How is the performance curve of a turbine generated?

The performance curve of a turbine is generated through a series of tests and experiments. First, the turbine is installed and connected to a power source. Then, various parameters such as pressure, temperature, and flow rate are measured at different operating conditions. This data is then used to plot the performance curve, which shows the relationship between the turbine's efficiency and the operating conditions.

2) What parameters are typically measured in generating the performance curve?

The parameters that are typically measured in generating the performance curve of a turbine include pressure, temperature, flow rate, power output, and efficiency. These parameters are measured at various operating conditions to understand how the turbine performs under different conditions.

3) How does the performance curve affect the selection of a turbine?

The performance curve is a crucial factor in selecting a turbine for a specific application. It provides information about the efficiency and operating range of the turbine, which can help determine if it is suitable for the desired application. A steeper and narrower performance curve indicates a more efficient turbine, while a flatter and wider curve may be more suitable for a wider range of operating conditions.

4) How can the performance curve be used to improve the efficiency of a turbine?

The performance curve can be used to identify the operating conditions at which the turbine performs most efficiently. By adjusting the operating conditions to match these points, the efficiency of the turbine can be improved. Additionally, the performance curve can also be used to identify any potential issues or limitations in the turbine's performance, allowing for improvements to be made.

5) Are there any limitations to the performance curve of a turbine?

Yes, there are some limitations to the performance curve of a turbine. The data used to generate the curve is based on ideal conditions and may not always accurately reflect the performance of the turbine in real-world situations. Additionally, the performance curve may not account for factors such as wear and tear, which can affect the turbine's efficiency over time. It is important to regularly update and recalibrate the performance curve to ensure its accuracy.

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