PART 2- POWER AND PROPULSION CYCLE 2A -Gas Power and propulsion cycles SB&vW-118,119,11.10,11.11,11.12,1113,11.14] In this section we analyze several gas cycles used in practical applications for propulsion and power generation, using the air standard cycle. The air standard cycle is an the actual cycle behavior, and the term specifically refers to analysis using the folpproximation to assumptions

2. B Power Cycles with Two-Phase Media (Vapor Power Cycles) [SB&vw-chapter 3, Chapter ll, Sections 11.1 to 11.7] In this section, we examine cycles that use two-phase media as the working fluid. These can be combined with gas turbine cycles to provide combined cycles which have higher efficiency

Index absorptance HT-54 cylindrical geometry see non-planar geometry absorption HT-57 adiabatic 0-5.0-9 Diesel cycle 2A-4 adiabatic efficiency see efficiency diffusivity ht-22 adiabatic flame temperature 2C-7 dissipation 1C-10 drag HT-24 Biot number HT-30, HT-36 black body HT-56, HT-63 see also

1叶格尔CM等著.飞机设计.杨景佐等译.北京:航空工业出版社,1986 2杨景佐,曹名编.飞机总体设计.北京:航空工业出版社,1991 3 Raymer D P. Aircraft Design: A Conceptal Approach. AlAA Education Series, 1992 4[美]雷曼尔DP著.现代飞机设计.钟定逵等译.北京:国防工业出版社,1992

We are going to consider the forces exerted on a material. These can be external or internal. External forces come in two flavors: body forces(given per unit mass or volume) and surface forces(given per unit area). If we cut a body of material in equilibrium under a set of external forces along a plane as shown in fig. 1. and consider one side of it we draw two conclusions: 1 the equilibrium provided by the loads from the side taken out is provided by a set of forces that are distributed among the material particles adjacent to

A Cauchy stress component at a given(fixed) point P of a structure in equilibrium under the action of external loads is defined when 1. the direction of the face on which the stress component acts is specified 2 the direction of the force from which the stress component is derived is specified None of the above statements

1. Arranging insurance cover for the buyer 执事先生 第645号500件印花棉布的合约是以成本加运费的价格而定,但贵公司的 信用证却规定为成本加保险和运费。这一不符显然必须修改。 为避免进一步延误,本公司建议代为安排有关投保手续。保险费为140美 元,将在贵公司2%的佣金内扣除

§2—1 铰链四杆机构的基本形式和特性 §2—2 铰链四杆机构有整转副的条件 §2—3 铰链四杆机构的演化 本章要点： 1、铰链四杆机构的基本形式及铰链四杆机构曲柄运动特性。 2、平面连杆机构、平面四杆机构概念 3、整转副存在的条件。 4、铰链四杆机构的演化

§11—1 齿轮的失效形式 §11—2 齿轮材料及热处理 §11—3 齿轮传动精度 §11—4 直齿圆柱齿轮传动的作用力及计算载荷 §11—9 齿轮的构造 §11—10 齿轮传动的润滑和效率 §11—6 直齿圆柱齿轮传动的轮齿弯曲强度计算 §11—5 直齿圆柱齿轮传动的齿面接触强度计算

§4—1 齿轮机构的特点和类型 §4—2 齿廓实现定角速比传动的条件 §4—3 渐开线齿廓 §4—4 齿轮各部分名称及渐开线标准齿轮的基本尺寸 §4—7 根切、最少齿数及变位齿轮 §4—8 平行轴斜齿轮机构 §4—9 圆锥齿轮机构 §4—6 渐开线齿轮的切齿原理 §4—5 渐开线标准齿轮的啮合