ME438 Programs - PowerPoint PPT Presentation
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ME438 Programs
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Adiabatic Flame Temperature Program ... Use mouse to highlight or Ctrl A selects all text ... Tab-delimited text-based file. Thermodynamic Graphs ... – PowerPoint PPT presentation
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Title: ME438 Programs
1
ME438 Programs
- byDr. Christopher Depcik
- October 28, 2005
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Two Programs
- Adiabatic Flame Temperature Program
- Constant Volume and Constant Pressure
- Thermodynamic Cycle Simulation
- Ideal Gas or Fuel-Air Combustion
- Constant Volume, Constant Pressure or Limited
Pressure - With or Without Intake and Exhaust
- Windows Based with Post-Processing Included
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Adiabatic Flame Temperature Program
- Description of the Program is Available at
http//www.depcik.com/eduprograms/aftp.htm
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Thermodynamic Cycle Simulation
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Input
- Can Enter Through Forms, Menu or All Input Screen
- Suggest Entering in Following Order
- Thermodynamic Cycles button
- Select Cycle Type and Working Fluid
- Cycles Parameters button and enter data
- Working Fluid Specification button and enter data
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Thermodynamic Cycles Available
- Constant Volume
- Constant Pressure
- Limited Pressure
- Constant Volume with Intake and Exhaust
- Constant Pressure with Intake and Exhaust
- Limited Pressure with Intake and Exhaust
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Working Fluid Type
- Hit Working Fluid Specification Button
- Ideal Gas with Constant Specific Heats
- Fuel-Air Combustion
- Need to link to thermodynamic datafile
(thermodata.cyd) - Full equilibrium option and can freeze species
after combustion
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Global Parameters
- Parameters Used for Display and Calculation
Purposes - Increase Number of Points for better looking
graphs - Newton-Raphson parameters used in case simulation
gives erroneous results - Increase Slope Divider and Max Iterations
- Ex For a CV Nitromethane process you need to
increase these values (see T-S Plot)
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Use All Input Window
- Reachable Through Input Menu
- Can Adjust all Run-Time Parameters
- Should dynamically update when selecting Cycle
Type and Working Fluid
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Main Program Save and Open
- Under File Menu
- Save Current Configuration (Save)
- Use Open to retrieve this file
- Save With Run Results (Save with Run Results)
- Use Open with Run Results to retrieve this file
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Output
- Reachable Through Output Menu
- Process Parameters state variables, work, heat,
efficiencies, etc - Thermodynamic Graphs Pressure vs. Volume,
Temperature vs. Entropy, etc - Performance Graphs Efficiency, Work, IMEPn/p1,
IMEPn/p3, etc - Can Save
- Data and Images
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Process Parameters
- Copy and Paste Available
- Use mouse to highlight or Ctrl A selects all
text - Ctrl C copies (or use menu) and use Ctrl V to
paste in Word, Excel, etc - Menu Save
- Tab-delimited text-based file
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Thermodynamic Graphs
- Use x-axis and y-axis lists to select graphs to
plot - Save Data
- Tab or Comma-Space delimited
- Save data for individual graph pictured
- Save All Graphs data for all graphs
- Provide common name
- tmp.csv becomes tmp_pV.csv
- Save As Image
- JPEG or PNG image
- Right-click mouse on graph for GUI that adjusts
graph image - Go to ChartGroupsData to view the actual plot
data
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Performance Graphs
- See Previous Slide for Options
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Help Menu
- If Connected to Internet can Reach Cycles
Webpage, Feedback Form and Bug Submission
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Disclosure
- I understand that there will be some bugs in the
program and things may go awry every once and a
while. Please be patient with the program as I
have programmed all of the code and visual
aspects myself which took a lot of time
independent of my actual work (i.e. what I get
paid for). I hope that you enjoy the program and
it makes your life a little easier ? - Sincerely,
- Chris
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