Numerical Solution of Sensibility Based on Ventilation Network Calculation and Its Applications
Airflow fluctuation is inevitable in mine ventilation. It is very important to know the range of airflow fluctuation for the airways in a ventilation network. Under normal conditions, airflow rates may change mainly due to two reasons. One is possible changes of parameters of the structure or ventilation resistances, the other is possible changes in characteristics of ventilation fans. For coal mines, the airflow rate of one airway can b~ regarded as a multivariate function of ventilation resistances, thus a concept of sensibility is advanced to indicate the airflow changes of one airway due to its change of ventilation resistance. In a same way, a concept ofrelative sensibility is defined as the relative changes of airflow in one airway due to its relative change of ventilation resistance. In a complex ventilation network, it is difficult to give an explicit functional expression for the multivariate function mentioned above. However, when the calculation program of ventilation network is employed repeatedly, its numerical solution can be easily obtained, so does that of the sensibility and relative sensibility. By adopting the principle of linear superposition of total differential, the evaluation of fluctuant range of airflow rate in each airway can be obtained with known values of the ventilation resistances in the network. The error of the evaluation method presented in this paper is analyzed, which shows a satisfactory applicability of the results.
ventilation network sensibility error analysis modulation of airflow
WANG Honggang FAN Jingdao WU Fengliang CHANG Xintan
School of Energy Engineering,Xian University of Science and Technology,Xian 710054,Shaanxi,China School of Energy Engineering,Xian University of Science and Technology,Xian 710054,Shaanxi,China;H
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
1570-1574
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）