######## WORK NOTES COPIED FROM INCIDENT 900778 ########
**** Entered By: clwaata @ 04/30/2009 10:07 AM ****
Question:
I have a transient result file and I want to calculate the torque using the CEL torque function from cfx5post. I noticed that the torque is calculated using the pressure from the current time step. How is it possible to make the torque function to use the time-averaged pressure (Absolute Pressure.Trnavg) in order to calcute the time-averaged torque?
Answer:
Steps to calculate the time-average torque in CFX-Post (Example axial rotor stator tutorial)
1. Create an expression for myTorque (Torque_z()@R1 Blade × Number of Blade)
2. Create an additional variable, myAV torque
Variable Type: Specific
Unit : N m
Tensor type: Scalar
3. Set in the rotor domain the additional variable
myTorque
Type: Algebraic
4. Set the transient statistic option
Output ? trn Stats ? New
Option : Arithmetic Average
Output variable List: myAV torque
5. After simulation you would have a new CFX-Post variable (myAV Torque. Trnavg), at the required loaction (in this case at the Rotor blade)
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######## WORK NOTES COPIED FROM INCIDENT 900778 ######## **** Entered By: clwaata @ 04/30/2009 10:07 AM **** Question: I have a transient result file and I want to calculate the torque using the CEL torque function from cfx5post. I noticed that the torque is calculated using the pressure from the current time step. How is it possible to make the torque function to use the time-averaged pressure (Absolute Pressure.Trnavg) in order to calcute the time-averaged torque? Answer: Steps to calculate the time-average torque in CFX-Post (Example axial rotor stator tutorial) 1. Create an expression for myTorque (Torque_z()@R1 Blade × Number of Blade) 2. Create an additional variable, myAV torque Variable Type: Specific Unit : N m Tensor type: Scalar 3. Set in the rotor domain the additional variable myTorque Type: Algebraic 4. Set the transient statistic option Output ? trn Stats ? New Option : Arithmetic Average Output variable List: myAV torque 5. After simulation you would have a new CFX-Post variable (myAV Torque. Trnavg), at the required loaction (in this case at the Rotor blade) |
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