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The report snippet below shows the signal attenuation caused by the plasma. The result plot below shows the blackout interval (black) and the signal cutoff frequency (red) below which a blackout will occur. The entire solution workflow is automated in Ansys ModelCenter. An external script computes the RF attenuation due to plasma and reports the results back to STK. We also use Fluent to simulate the plasma density distribution around the vehicle. An 11 species, 20 reaction non-equilibrium model simulates the chemical reaction in the air. ffd file.įor every scenario time step, airflow around the capsule is simulated in Fluent. The antenna pattern for the capsule is generated in Ansys HFSS and loaded into STK as a. Here we model a capsule re-entering at Mach 20 and transmitting data to a ship over a 2.4 GHz S-band link. The part of the file name indicates the expiration date of the license file Extract the license file and note where to save it: We recommend moving the license file to C: \ Program Files \ ANSYS Inc \ Shared Files \ Licensing, but you can also.
Ansys 11 license generator generator#
STK’s flexibility to interact with other applications enables us to adjust the level of fidelity in our simulations. Download the Student ANSYS license generator file ansysstudentyyyymmdd.lic to the computer. By combining STK’s powerful multidomain trajectory propagators and access algorithms with high fidelity aerothermodynamic simulations in Ansys Fluent, we can build an entire mission composed of physics-based models tied in a digital thread. Turns out, it is exactly these types of demanding mission scenarios where STK shines. Simulating a hypersonic blackout is challenging due to the multidomain nature of the problem it involves trajectory and RF modeling, access computation, and aerothermodynamic analysis. Intel processor numbers are not a measure of performance.
Ansys 11 license generator software#
If the RF link frequency is lower than the plasma frequency, the signal does not propagate through the plasma and a “blackout” happens. Workstations and ANSYS® 11.0 Software Solutions Workstations powered by the second-generation Quad-Core Intel® Xeon® processor 5400 series1 enable users of ANSYS 11.0 software to work differently, doing more work in parallel and delivering superior product designs faster. The plasma enveloping the vehicle poses challenges for radio frequency (RF) communication. The temperature around the vehicle is enough (thousands of degrees Kelvin) to cause dissociation of the surrounding air and generate plasma. Hypersonic vehicles experience strong shock and intense aerodynamic heating. There is much interest in the concept of hypersonic airliners, which could take you from New York to Paris in 30 minutes. Reentering space capsules routinely travel at five times the speed of sound, often defined as hypersonic speed.