This calculator, written in Javascript by William Devenport at the Aerospace and Ocean Engineering Department , Virginia Tech , computes the standard relations for compressible flow of a perfect gas. The relations themselves are taken from standard aerodynamics texts. Gamma' and 'rho' are substituted for the corresponding greek letters denoting the ratio of specific heats and density. For each set of relations the calculator is used by selecting the variable to input, typing in its value, and then pressing the calculate key. For example, to compute the flow properties corresponding to a Prandtl-Meyer angle of 20 degrees, go to the 'Isentropic flow relations'.
Output is displayed in the table immediately following.
The scratch pad is for performing the miscellaneous calculations necessary when using the Calculator to solve an aerodynamics problem. Results may be pasted into the input fields of the Calculator. You may adjust the size of the frame containing the scratch pad, should it be too big or too small, by dragging the frame divider up or down.