CAJ | 학술논문

使用压缩空气作为介质进行流体计算时，为保证计算精度须考虑压缩因子的影响。为了精确得到压缩空气的压缩因子，对压缩因子的计算方法进行了研究。将空气简化为氮气与氧气的混合气体，通过3个真实气体状态方程计算压缩因子，并与已有数据进行比较，验证了将空气模型简化，再计算其压缩因子的方法是可行的。BWRS方程计算出的压缩因子精度较高，但在不同压力下的计算误差有较大差距。为进一步提高计算精度，考虑了偏心因子的影响，通过计算分析、经验修正，得到了精度较高的压缩因子计算算法，并进行了试验验证。结果表明：不同压力下改变偏心因子的数值对计算结果有不同程度的影响；改进后的BWRS方程计算精度得到了提高，从而验证了BWRS方程改进算法计算压缩因子的有效性和可行性。
사용압축공기작위개질진행류체계산시，위보증계산정도수고필압축인자적영향。위료정학득도압축공기적압축인자，대압축인자적계산방법진행료연구。장공기간화위담기여양기적혼합기체，통과3개진실기체상태방정계산압축인자，병여이유수거진행비교，험증료장공기모형간화，재계산기압축인자적방법시가행적。BWRS방정계산출적압축인자정도교고，단재불동압력하적계산오차유교대차거。위진일보제고계산정도，고필료편심인자적영향，통과계산분석、경험수정，득도료정도교고적압축인자계산산법，병진행료시험험증。결과표명：불동압력하개변편심인자적수치대계산결과유불동정도적영향；개진후적BWRS방정계산정도득도료제고，종이험증료BWRS방정개진산법계산압축인자적유효성화가행성。
When using compressed air as medium of flow calculation,compressibility factor should be considered to ensure the calculation accuracy. In order to obtain the precise compressibility factor of compressed air,the compressibility factor calcula-tion method was studied. The air was reduced to mixed gas of nitrogen and oxygen, three real gas equations of state were used to cal-culate the compressibility factor and the calculations were compared with the practical data, verify the feasibility of this calculation method. The calculation accuracy of BWRS equation is the highest of the three equations,but the calculation error of BWRS equa-tion varies widely under different pressures. In order to improve the accuracy,the impact of acentric factor was considered. Empiri-cal correction was made after calculation analysis, an improved calculation algorithm with higher precision was obtained, and the im-proved algorithm was then verified through experiment. The results show that changing the value of acentric factor has different im-pacts on the calculation results under different pressures and the calculation precision is improved after empirical correction, pro-vides the improved BWRS equation calculation method is feasibility and validity.