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矿井通风教材中伯努利方程的准确表达与推导

发表时间:2013-03-31  浏览量:1228  下载量:608
全部作者: 李宗翔,刘立立
作者单位: 辽宁工程技术大学安全科学与工程学院
摘 要: 针对高校矿井通风教材中伯努利方程推导与合理表达的问题,提出一种规范性伯努利方程表达方法。从密度非均质大气场的概念出发,给出正确的矿井通风伯努利方程推导过程。指出采用区别表达方程中的动压项、位压项中的风流密度,能够避免初学者在理解伯努利方程时出现的歧义和混淆,以及克服在计算中常出现的错误;同时,规范性伯努利方程也对自然风压的表达给出了新的规范。研究为消除当前出现的问题教材所造成的不良影响提出帮助和警示。
关 键 词: 矿山安全;高校教学;通风教材;伯努利方程;规范表达;密度非均匀大气场
Title: Accurate expression and deduction of Bernoulli equation in mine ventilation materials
Author: LI Zongxiang, LIU Lili
Organization: College of Safety Science and Engineering, Liaoning Technical University
Abstract: According to the problems of fluid Bernoulli equation derivation and equation expression in mine ventilation materials of university teaching, this paper proposed a normative expression method of Bernoulli equation. Based on the concept of density nonuniformity atmospheric field, the correct process of Bernoulli equation derivation was given. It was pointed out that beginners could avoid ambiguity and confusion in understanding Bernoulli equation and overcome the errors appeared in calculation through distinguishing the expression of airflow density of dynamic pressure and bit pressure in equation. At the same time, normative expression of Bernoulli equation also provided the new normative expression standards for natural wind pressure. This study provided the help and warning for overcoming the harmful effects which caused by the existing problems in the current materials.
Key words: mine safety; university teaching; ventilation materials; Bernoulli equation; normative expression; density nonuniformity atmospheric field
发表期数: 2013年3月第6期
引用格式: 李宗翔,刘立立. 矿井通风教材中伯努利方程的准确表达与推导[J]. 中国科技论文在线精品论文,2013,6(6):577-581.
 
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