Calculation method of nozzle jets in large space

Together with a number of domestic and foreign literatures, establishes a set of calculation system for nozzle jets based on existing jet theories. By comparing a number of single-jet calculation systems at home and abroad, finds that the difference of coefficient of the formulas leads to the difference of results, and that there exist errors in some domestic manuals. From a theoretical perspective, deduces the formula of multiple jets, and compares its calculation result with those of the single-jet formula and the multiple non-isothermal parallel jet formula. Gives the air resistance and noise calculation formulas, and sums up a process chart of jet calculation.