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如果將教學(xué)工作過(guò)于極端地細(xì)化管理,那是將教學(xué)誤認(rèn)為一種機(jī)械的工作,并不能真正實(shí)現(xiàn)互動(dòng)性的啟發(fā)式教學(xué),也難以做到真正的因材施教。(二)教學(xué)內(nèi)容主要內(nèi)容:1) 音速 馬赫數(shù)2) 氣體一維絕能定常流動(dòng)和等熵定常流動(dòng)3) 變截面管流本課程的總復(fù)習(xí)基本概念和知識(shí)點(diǎn):音速,馬赫數(shù),滯止?fàn)顟B(tài),極限狀態(tài),臨界狀態(tài),氣體速度與通道截面的關(guān)系,收縮噴管,縮放噴管問(wèn)題與應(yīng)用:(1)當(dāng)?shù)厮俣? 當(dāng)?shù)匾羲?,滯止音速 ,臨界音速,說(shuō)明各自的意義,及它們之間的關(guān)系。 (4) steps for solving problems Application of Bernoulli Equation (1)The Pitot Tube for Measuring Velocity (2)Venturi Meter Momentum Equation 基本概念和知識(shí)點(diǎn):Lagrangian Description of fluid motion, Euler Description of fluid motion, streamline, pathline, streamtube, total flow, cross section, flux, mean velocity, classification of fluid flow, control volume, continuity equation, bernoulli equation, momentum equation問(wèn)題與應(yīng)用:What are the research objects of Eulerian Description and Lagrangian Description of Motion? In engineering, which description of motion is utilized?Why should we introduce mean velocity over the section in the total flow analysis method?What are streamline and pathline? What are their differences?What are the conditions of steady total flow energy equation? If the value of force calculated from momentum equation is negative, what does that mean?(三)課后練習(xí),,參考書:莫乃榕. 工程流體力學(xué). 武漢:華中科技大學(xué)出版社, 1999中的選擇題練習(xí)(四)教學(xué)方法與手段分組討論、課堂討論、問(wèn)題教學(xué)法、實(shí)驗(yàn)Chapter 4 Similitude and Dimensional Analysis(雙語(yǔ)教學(xué))(一)目的與要求know about: the deduction method of similarity criterions based on mechanical similarity, the application of dimension analysis method be acquainted with: the pi(π) theorem, understand: three basic theorems on Similarity Theory, understand the concept of mechanical similarity, approximate similarity(二)教學(xué)內(nèi)容主要內(nèi)容:three basic theorems on Similarity Theory, the concept of mechanical similarity, the deduction method of similarity criterions based on mechanical similarity, the pi(π) theorem, the application of dimension analysis method, the application of approximate similarity and Uses of Similitude(1) Geometric similarity (2)Kinematic similarity (3) Dynamic similarity Similarity Criterion(1)Reynolds number (2) Froude number (3) Euler number(4) Mach number(5) Weber number (6) Archimedes Number Dimensional Analysis基本概念和知識(shí)點(diǎn):dimension, Similarity Theory, geometry similarity, kinematic similarity dynamic similarity, mechanical similarity, similarity criterion, the pi(π) theorem, approximate similarity問(wèn)題與應(yīng)用:What is concept of mechanical similarity?Do you know anything about the application of dimension analysis method?(三)課后練習(xí),參考書:莫乃榕. 工程流體力學(xué). 武漢:華中科技大學(xué)出版社, 1999中的選擇題練習(xí)(四)教學(xué)方法與手段分組討論、課堂討論、問(wèn)題教學(xué)法第五章 管內(nèi)不可壓縮流體流動(dòng)(一)目的與要求了解:圓管道內(nèi)切應(yīng)力分布,層流流動(dòng)入口段長(zhǎng)度,湍流流動(dòng)中的粘性底層,湍流流動(dòng)中的速度分布,紊流時(shí)均化和普朗特混合長(zhǎng)度理論,局部主力產(chǎn)生的原因,幾種典型局部構(gòu)件的局部阻力系數(shù)的計(jì)算, 沿程阻力系數(shù)和局部阻力系數(shù)的測(cè)試方法,管網(wǎng)計(jì)算熟悉:層流和紊流的特征,沿程阻力損失的成因和沿程阻力系數(shù)的變化規(guī)律,沿程阻力損失的計(jì)算,局部阻力損失的計(jì)算,摩擦系數(shù)曲線圖,湍流流動(dòng)中的粘性底層理解:流體運(yùn)動(dòng)兩種形態(tài)及其判別,流動(dòng)阻力損失計(jì)算的達(dá)西公式,簡(jiǎn)單管路流動(dòng)阻力計(jì)算,串聯(lián)管路和并聯(lián)管路的水力計(jì)算(二)教學(xué)內(nèi)容主要內(nèi)容:1) 層流與湍流流動(dòng)2) 等截面管道內(nèi)粘性流動(dòng)沿程水頭損失3) 圓管道內(nèi)切應(yīng)力分布4) 圓管道內(nèi)層流流動(dòng)及粘性摩擦損失5) 層流流動(dòng)入口段長(zhǎng)度6) 湍流流動(dòng)中的粘性底層7) 湍流流動(dòng)中的速度分布8) 沿程摩擦阻力系數(shù)計(jì)算9) 簡(jiǎn)單管道內(nèi)流動(dòng)計(jì)算10) 局部阻力損失11) 管路流動(dòng)計(jì)算12) 管路及管網(wǎng)阻力計(jì)算基本概念和知識(shí)點(diǎn):層流,湍流,雷諾數(shù),臨界雷諾數(shù),沿程水頭損失,達(dá)西公式,粘性摩擦附圖系數(shù),粘性底層,莫迪圖,局部阻力損失,局部阻力系數(shù),簡(jiǎn)單管路、串聯(lián)管路和并聯(lián)管路流動(dòng)阻力計(jì)算問(wèn)題與應(yīng)用:(1)怎樣判別粘性流體的兩種液態(tài)——層流和紊流?(2)為何不能直接用臨界流速作為判別液態(tài)(層流和紊流)的標(biāo)準(zhǔn)?(3)常溫下,水和空氣在相同的直徑的管道中以相同的速度流動(dòng),哪種流體易為紊流?(4)何謂粘性底層?它對(duì)實(shí)際流動(dòng)有何意義?(5)紊流不同阻力區(qū)(光滑區(qū),過(guò)渡區(qū),粗糙區(qū))沿程摩擦阻系數(shù)的影響因素何不同?(6)試比較圓管層流和紊流水力特點(diǎn)(切應(yīng)力、流速分布、沿程水頭損失)的差異