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摘要： 综合国内外的诸多文献，在现有射流理论的基础上，建立了一套喷口射流的计算体系。对国内外多个单喷口射流的计算体系进行了比较，各公式中的计算系数不同导致了计算结果的差异，并指出了国内一些手册中应用公式时存在的一些错误。理论推导了多股射流叠加的计算公式，并将该公式与单股射流及多股平行非等温射流公式的计算结果进行了比较。给出了喷口送风阻力及噪声的计算公式，并将各个分步计算汇总成射流计算的流程图。 关键词 ：射流 喷口 高大空间 计算方法 Calculation method of nozzle jets in large space By Gu Xianliang★, Han Weiping, Zhao Jianing and Gao Fusheng Abstract 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. Keywords jet, nozzle, large space, calculation method ★ Beijing Institute of Architectural Design, Beijing, China