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My programming ramblings Compiling Xfoil on OS X Posted on January 23, 2014 by Sol If you are into airfoil analysis as an amateur or as a professional you will need a quick way to estimate the aerodynamic characteristics (lift, drag and momentum coefficients) of a given airfoil. The classical approach to calculate the performance of an airfoil is to use a coupled inviscid/viscous flow solver. On a modern computer this analysis will usually take less than a minute. Compare this with a full approach that uses the equations for the laminar part of the flow and the equations for the turbulent part of the flow. In the former case a typical analysis can run from a few minutes to a few hours on a modern PC. Is an open source interactive program for the design and analysis of subsonic isolated airfoils.
Mar 12, 2018 - I kept getting a media driver error after clicking the install button from multiple builds using a bootable USB. I tried downloading a new ISO from. 2017-8-29 Import an airfoil. Rhino for Windows. It cannot seem to find the unzipped database of airfoil files. Instead, it seems to be looking at an array of Windows System 32 folders. This is a Win 7 64-bit system. I used a java application called javafoil you may have to install java of course and can run it in the browser or as an.
Xfoil uses a potential flow solver coupled with a solver to calculate the flow field around an airfoil. The author, Mark Drela, provides a Windows binary on Xfoil’s web page. If you are a Linux user building Xfoil from sources is straightforward. For OS X, well, it is a bit more complicated to build the code from sources. A typical Xfoil result is presented in the next figure: In order to be able to build and run Xfoil on OS X you will need an X server like. Xfoil is implemented in Fortran and C, so we’ll need a C and Fortran compiler. Will give you the C compiler.
A Fortran compiler can be from sources or installed from. On my machine, I’ve built from sources with the C, C and Fortran compilers, but you can safely use the ones from Homebrew if you prefer. Assuming that you have all the requirements (XQuartz, gfortran, gcc) installed, we can start the actual compilation of Xfoil. You can download the latest sources from Xfoil’s web. In the remaining of this post I will suppose that you have extracted Xfoil in your home folder. Open a Terminal and navigate to the orrs folder from Xfoil.
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OpenMETA-Vahana An OpenMETA model for the conceptual design of an autonomous transport aircraft Table of Contents. Summary Inspired by Project Vahana from A³ by Airbus, we built OpenMETA models of the Vahana Tilt-Wing Multirotor aircraft using A³'s publicly released source code as a template. A parametric CAD model of Vahana was also built within OpenMETA with the goal of using CAD analysis to improve the accuracy of future studies. The most recent draft of this CAD model is shown below with its rotors angled to transition between the hover and cruise modes. Vahana CAD model: The OpenMETA models were used to perform similar DOC analyses to those in the Vahana Configuration Trade Study as well as improve on the original study.
OpenMETA 'Optimizer' Results and Vahana Trade Study Results for Tilt-Wing Configuration at Range of 100 km: DOC ($) DOC (km/$) rProp (m) cruiseSpeed (m/s) batteryMass (kg) motorMass (kg) mtom (kg) OpenMETA. 92.78 0.93 0.98 48.6 304.2 55.6 799 Vahana Study 92.78 0.93 0.98 48.6 304.2 55.6 799.after correcting for double fuselage drag. OpenMETA PET model results: DOC vs.
Range for Tilt Wing and Helicopter Configurations DOC vs. Range for Tilt Wing Configuration with and without Fuel Weight Constraint Vahana Configuration Trade Study Vahana is an A³ campaign to create a low-cost, single-passenger, electric VTOL aircraft. As part of their design process, A³ conducted the Vahana Configuration Trade Study to better examine 2 different configurations (an electric helicopter and an electric eight-fan tilt-wing) using multidisciplinary design optimization (MDO).
A³ set up a MDO sizing problem in which they compared an electric helicopter model and an electric eight-fan tilt-wing model over a range of operating distances (10 km to 200 km in 10 km steps). At each distance, both vehicle models were optimized seperately for Direct Operating Cost (DOC) by varying 5 design variables: Cruise Speed, Rotor Radius, Battery Mass, and Takeoff Mass. The A³ team also provided the optimizer with 3 constraint equations (4 if the vehicle was a helicopter) that defined certain design requirements (e.g.: the vehicle's effective energy capacity had to be greater than the amount of energy required to execute a reserve ('worst case') mission). As a result of their Sizing Trade Study, the Vahana team concluded that an eight-fan, tilt-wing configuration would best meet their broad design requirements for a low-cost, single-passenger, electric VTOL aircraft. OpenMETA Vahana Configuration Trade Study Here at MetaMorph, we set out to first replicate the Vahana Configuration Trade Study's results using the OpenMETA toolset.
Since OpenMETA is designed for Multidisciplinary Design Analysis and Optimization, we thought that it would be interesting to see if we could reproduce the A³'s results using the OpenMETA toolset. To read about the OpenMETA Vahana Configuration Trade Study, check out our. To start working with the OpenMETA Vahana Model, check out the sections below. Getting Started with the OpenMETA Vahana Model Installing OpenMETA. Download the latest version of OpenMETA from. Open the installer.
Agree to the license terms and conditions. Left-click 'Install'. Note: If this is your first time using OpenMETA, we recommend that you complete the PET Tutorial to develop a basic understanding of the tools!
Downloading Xfoil (required to run Xfoil TestBenches) For Windows:. Download XFOIL6.99.zip (Xfoil 6.99 for Windows) from. Extract the contents of XFOIL6.99.zip to C:/OpenMETA/xfoil-and-nrel-codes/bin/ (you may need to create this directory). For Mac:.
Download xfoil.dmg (Independent 3rd-party build of Xfoil for Mac) from. Drag-and-drop Xfoil.app into your Applications folder. Cloning the openmeta-vahana repository.
Copy the following key onto your clipboard: [email protected]:metamorph-inc/openmeta-vahana.git. Open Git Bash in your desired project directory. Run the following command in Git Bash: git clone [email protected]:metamorph-inc/openmeta-vahana.git Opening the openmeta-vahana project. Open the openmeta-vahana folder. Double-click on the openmeta-vahana.xme file.
GME will open and display a pop-up 'Import to new project' window. Select 'Create project file' and click 'Next '. The 'Save As' window will open. Click 'Save' to save 'openmeta-vahana.mga' inside the openmeta-vahana folder Viewing a PET model. Within GME, to your right, there should be a 'GME Browser' window with a single 'RootFolder' object inside. Click on the '+' to expand the root folder. Left-click on the '+' next to 'Testing' to expand the testing folder.
Left-click on the '+' next to 'ParametricExploration' to expand the parametric exploration folder. You should now see a number of PETs. Within the GME Browser window, double-click on 'TiltWingPET' to open it.
Running a PET model. Left-click the CyPhy Master Interpreter button located on the top toolbar. The 'CyPhy Master Interpreter' window will open. Make sure 'Post to META Job Manager' is checked and left-click 'OK'. The 'Results Browser' window will open.
The running PET will be listed under the 'Active Jobs' tab. Blue means the Master Interpreter is still running, red means the Master Interpreter failed, and green means that the Master Interpreter succeeded.
Once the DemoVahanaTiltWingPET finishes running, left-click the PET tab of the Results Browser. Information from the PET run will be displayed to your right within the Results Browser window. Viewing PET model results in the Visualizer. Left-click the 'Launch in Visualizer' button in the bottom-right corner (of the Results Browser window) to view the results in the PET Visualizer. The Visualizer will open in a browser window.
Left-click the 'ExploreSingle Plot' tab. Under the 'Variables' section, set the X-Axis to 'Range' and the 'Y-Axis' to 'DOCPerKm'. PETs included in openmeta-vahana The following PETs are included in the openmeta-vahana project in the RootFolderTestingParametricExploration directory.