All other values will be solved for automatically. Generally, enter only one value and push calculate. The pull-down menu indicates if the flow is supersonic or subsonic. Based upon my students' solvers - Arman Ghannadian and Christian King. Currently, I believe it is the highest accuracy solver available on the Internet. The solver can take sometime on modern hardware as it is seeking single precision solutions using a bi-section method. Error of the solver is shown in the debug text at bottom of page. There is no error detection or shock detachment checks. The second value should either be the cone half-angle, theta, or the weak shock angle, beta. The value of M_1 represents the free-stream Mach number and must be entered. If no value of gamma is entered, the default value will be 1.40. All other values calculated automatically. Most common problems are when detached shocks occur (no solution of these equations) or when the user provides unphysical values (e.g. A fully successful solution occurs when your input values remain unchanged and all values are not NaN. The calculator will do its best to find a solution, and even over-write poorly formed input values. If no value of gamma is entered then 1.40 will be used. If the calculator returns NaN, it is likely that the values entered were ill-determined, in conflict, resulted in a detached shock, or had some other non-physical issue. Familirity with two-dimensional oblique shock wave theory is very useful here. Note that depending on which values are entered, the system of equations might be over-determiend or under-determined. Use the pull-down menu to select if the shock wave is strong or weak then push calculator. All other values will be calculated automatically. For area ratio input, indicate if the flow is supersonic or subsonic at location A. It is good enough for engineering work up to 47 km on Earth. Note that this calculator is approximate and does not exactly follow the standard atmosphere standard. Thermodynamic values are reported in the other boxes at that altitude. Type in an altitude in meters and click calculate. Approximate Fast Standard Atmosphere Calculator.The upper buttons denote default values for STP and NTP atmosphere standards. Push calculate to predict the unknown value. The pull-down menu denotes which value is unknown. Input all variables except the single unknown. Numerical solutions using various techniques are employed when analytical approaches are not available.īelow are descriptions or notes for each calculator Users should always be skeptical of all calculations, which is good practice in any event.Įach calculator solves analytical equations of fluid dynamics for specific problems.Ĭlosed form solutions are evaluated if possible. These often return NaN or alter the original input value. However, certain values provide mathematiclaly impossible situations. They are generally designed to give answers. The user may provide under-determined or over-determined information in the calculators. There are very few if no checks on input. These calculators are meant for someone with a working knowledge in the field. Or, it might denote which variable is being used for the calculation. When there is a pull-down menu available, it will either denote the flow being supersonic or subsonic. The calculator will automatically seek all other values. Almost every calculator can be used by clearing them (clear button) and then typing in a single value. Visit me on my University of Florida research group page.Īpproximate Fast Standard Atmosphere Calculator Clear See notes and instructions at the bottom of the page. Miller Fluid Dynamics Flow Calculators - Prof.
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