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COMPR Program User Guide October 1, 2002 Copyright  2002 - Jack D Mattingly, P

COMPR Program User Guide October 1, 2002 Copyright  2002 - Jack D Mattingly, Ph.D. Table of Contents 1. Main Window 1 2. View/Edit Data Window 2 3. Results Window – Perform Calculations 5 4. Sketch Results Window 7 1 1. MAIN Window When the COMPR program is run, the default input data file (Compr.cmp) is read and the Main window is displayed as shown below. The compressor mean-line design program COMPR is based on the equations developed in Elements of Gas Turbine Propulsion and Aircraft Engine Design, Second Edition. It can analyze the following five different types of mean-line design: 1. Constant hub radius. 2. Constant mean radius. 3. Constant tip radius. 4. User input tip radius. 5. Repeating stage/repeating row. Each of these designs can be analyzed using the user-selected unit system (English or SI) and swirl velocity distribution (three choices: free vortex, exponential, and first power). This program is designed to be user-friendly and multiple windows are used for program control and data input. COMPR input data files may be saved on disk for later use (the file extension “cmp” is used for these files). Also, saved input data files may be read from disk for current use. Program output is directed to an output window and may be sent to a printer. It is recommended that a multi-stage compressor design begin with the Repeating Stage/Row type of design. Starting from the results of this design, each stage can be custom designed using the User Input Tip Radius or another type of design. 2 2. VIEW/EDIT DATA Windows For the Repeating Stage/Row design, pressing the Initial/Stage button on the Main window opens the Initial/Stage Data window for that design as shown below. The approximate stator loss coefficient ( 2 2 /{ /[2 ]} s t c P V g φ ρ = ∆ ) allocates the stage total pressure loss (calculated using the polytropic efficiency) between the stator and rotor. For the other four designs, two buttons for data entry are displayed on the Main window: Initial button and Stage button (see below). 3 When the Initial data button is pressed, the following Initial Data window is displayed: When the Stage data button is pressed, the following data window is displayed: 4 Data is edited in this window by moving to the desired data cell, double-click on the cell to open an edit window as shown below. Make the changes and then press either the Enter key or Tab key and the updated window is displayed as shown below. If the IGV check box is marked on the Main window, the IGV button becomes active. Pressing the IGV button opens the Inlet Guide Vane Data window. 5 3. RESULTS Window – Perform Calculations Pressing the Perform Calculations button on the Main window causes the Results window to be opened and the input data and results displayed for the first stage (or IGV) as shown below for the first of a four-stage repeating stage/row design using the default data. If the computer has a default printer, the Print button is visible and the user can use it to have the results printed. The Next Stage button is active for advancement to the next stage calculations. The fourth stage results of the four-stage design is shown below. 6 Pressing the Done button displays the Main window with both Sketch Results buttons active as shown below. . 7 4. SKETCH RESULTS Window Pressing the Cross-section button on the Main window causes the Stage Sketch Data window to be opened and the input data displayed as shown below. Pressing the Calculate button on the Stage Sketch Data window displays the results on an updated window as shown below. If the Sketch button is selected before the Calculate button, the results are calculated but not displayed 8 Pressing the Sketch button displays the Sketch Pad window with a cross-sectional sketch of the multi-stage axial flow compressor. When the Done button is pressed, the user is asked if they want to save the reference data that has been calculated for this engine for input into the AEDsys program as shown below. Replying Yes opens the Save As file dialog box shown on the next page. 9 Pressing the Blade Profiles button on the Main window causes the Blade Description window to be opened and the input data displayed as shown below. Pressing the Plot button for the data above displays the Sketch Pad window with a sketch of the blade shape. The hub and tip blade profiles are shown in yellow and the profile at the radius of interest is shown in light blue. The rotor airfoil is shown on the left and the stator airfoil is shown on the right. 10 Pressing the Plot button for previous data with three blades per row displays the Sketch Pad window as shown below. uploads/s1/ compr-user-guide.pdf