crb rule of thumb for tracking

... maximum baffle pitch is a function of tube size 40 Rules of Thumb for Mechanical Engineers and, for no change of phase flow, of shell diameter If there is no change of phase in the shell-side fluid, ... k s circulation,therefore, the Grashof number (and heat transfer coefficient)will rise as the buoyancy forces increase and the viscous forces decrease 24 Rules of Thumb for Mechanical Engineers ... design of spillways, weirs, chanhs nel flows, and ship design 8 Rules of Thumb for Mechanical Engineers Weber Number Weber number is the ratio of inertial forces t surface teno sion forces where...

Ngày tải lên: 05/03/2014, 17:20

... maximum baffle pitch is a function of tube size 40 Rules of Thumb for Mechanical Engineers and, for no change of phase flow, of shell diameter If there is no change of phase in the shell-side fluid, ... k s circulation,therefore, the Grashof number (and heat transfer coefficient)will rise as the buoyancy forces increase and the viscous forces decrease 24 Rules of Thumb for Mechanical Engineers ... design of spillways, weirs, chanhs nel flows, and ship design 8 Rules of Thumb for Mechanical Engineers Weber Number Weber number is the ratio of inertial forces t surface teno sion forces where...

Ngày tải lên: 14/03/2014, 18:20

... Rules of Thumb for Chemical Engineers RULES OF THUMB FOR CHEMICAL ENGINEERS A manual of quick, accurate solutions to everyday process engineering ... partial open conditions for good control Figure shows partial open performance for a number of trim types General Control Valve Rules of Thumb Design tolerance Many use the greater of the following: ... Values of K,,, calculated from C, agree within 10% of published data of Km Values of C, calculated from K,,, are within 21% of published data of C, The control valve coefficients in Table are for...

Ngày tải lên: 04/06/2014, 16:06

... maximum baffle pitch is a function of tube size 40 Rules of Thumb for Mechanical Engineers and, for no change of phase flow, of shell diameter If there is no change of phase in the shell-side fluid, ... k s circulation,therefore, the Grashof number (and heat transfer coefficient)will rise as the buoyancy forces increase and the viscous forces decrease 24 Rules of Thumb for Mechanical Engineers ... design of spillways, weirs, chanhs nel flows, and ship design 8 Rules of Thumb for Mechanical Engineers Weber Number Weber number is the ratio of inertial forces t surface teno sion forces where...

Ngày tải lên: 27/06/2014, 06:20

... design of spillways, weirs, chanhs nel flows, and ship design 8 Rules of Thumb for Mechanical Engineers Weber Number Weber number is the ratio of inertial forces t surface teno sion forces where ... are of great value in fluid mechanics Reynolds Number Reynolds number is the ratio of inertial forces to viscous forces: between the two) through a critical value For example, for the case of ... Euler’s equation at constant density p 6 Rules of Thumb for Mechanlcal Engineers ~~ Bernoulli’s Equation Bernoulli’s equation can be thought of as a special form of energy balance equation, and it...

Ngày tải lên: 11/08/2014, 21:20

... k s circulation,therefore, the Grashof number (and heat transfer coefficient)will rise as the buoyancy forces increase and the viscous forces decrease 24 Rules of Thumb for Mechanical Engineers ... michess For a cylindrical system, such as in pipes (Figure 2), the equation becomes: T Q = 2n;(k)(length) ( o - Ti In (ro/ri) 20 Rules of Thumb for Mechanical Engineers Table Thermal Conductivity of ... power Therefore, it is not a good investment to spend a lot of time determjningPrandtl number for a gas Just using 85 should be adequate for most analyses Grashof W umber The Grashof number is...

Ngày tải lên: 11/08/2014, 21:20

... coalescence occurs, forming slug flow, which in turn gives way to annular flow further along the channel Close to this 44 Rules of Thumb for Mechanical Engineers point the formation of vapor at sites ... number of molecules,” we arrive at the general law for the ideal gas (equation of state): where ah’ accounts for the intermolecularattraction forces and b accounts for the finite size of the ... the two Therefore, two systems are in thermal equilibrium if they are at the same temperature 58 Rules of Thumb for Mechanical Engineers FIRST LAW OF THERMODYNAMICS The first law of thermodynamicsestablishes...

Ngày tải lên: 11/08/2014, 21:20

... diameter of the seal As a general rule of thumb, balanced seal designs use a balance ratio of 0.75 for water and nonflashing hydrocar- Figure 21 Balance ratio for inside seal (API-682 Courtesy of American ... mechanical closing force, or spring force, is expressed as Fsp.The amount of spring force is a function of the wire diameter, the number of springs, and the length of displacement For mechanical ... 0.05 for light hydrocarbons f = 0.07 for water and medium hydrocarbons f = 0.10 for oils For a graphical approach to determining seal-generated heat values, see Figure 43 [2] 88 Rules of Thumb for...

Ngày tải lên: 11/08/2014, 21:20

... Energy *Reprintedfrom Rules of Thumbfor Chemical Engineers Carl R Branan (Ed.), Gulf Publishing Company Houston Texas 1994 125 129 129 130 132 132 126 Rules of Thumb for Mechanical Engineers ... also very dependent on the precision of the gear tooth form manufactured Select from the columns of Table as follows: v = 262 x d x n (5) Rules of Thumb for Mechanical Engineers 136 Table Dynamic ... Houston.) 120 Rules of Thumb for Mechanical Engineers Centrifugal Compressor Performance Calculations Centrifugal compressors are versatile, compact, and generally used in the range of 1,000 to...

Ngày tải lên: 11/08/2014, 21:20

... and offset by the center distance While this 144 Rules of Thumb for Mechanical Engineers arrangement may be an advantage for some applications, the worm gear type is more frequently chosen for ... 172 174 175 177 146 Rules of Thumb for Mechanical Engineers TYPES OF BEARINGS There are two general categories of bearings: rolling element bearings and journal bearings Most of this chapter is ... suitably prepared as a rolling track for the rolling elements Bearing bore diameter (bore):The bore or I.D of the inner ring of a rolling bearing 150 Rules of Thumb for Mechanical Engineers Beaping...

Ngày tải lên: 11/08/2014, 21:21

... 7-1988 Bearings 171 172 Rules of Thumb for Mechanical Engineers ~~~ ~ Bearing Clearance The establishment of correct bearing clearance is essentialfor reliable performance of rolling element bearings ... housing or on the shaft 170 Rules of Thumb for Mechanical Engineers Table 17 Selection of Housing Tolerance Classifications for Metric Radial Ball and Roller Bearings of Tolerance Classes ABEC-1, ... stenciled with brand name, kind, schedule, length of pipe, and type of steel used In case of bundles, markings will appear on a bundle tag 188 Rules of Thumb for Mechanical Engineers ASTM A-106 Sizes...

Ngày tải lên: 11/08/2014, 21:21

... 3/4 642 13/16 744 03 m 846 m 13/16 222 Rules of Thumb for Mechanical Engineers Useful Formulas for Vessels C2,61 Properties of a circle (See Figure 1.) C G of area Circular ring c3 e, =- 12A, 120c ... radius of contact is a Geometric considerations very similar to those for the contactingcylinders reveal that the sum of the displacements for the two spheres should satisfy: 230 Rules of Thumb for ... Areas of Vessel Sections Motation Table Volumes and Surface Areas of Vessel Sections = height of cone, depth of head, or length of cylinder ~~ a = one-half apex angle of cone D = large diameter of...

Ngày tải lên: 11/08/2014, 21:21

... Engineers.) 242 Rules of Thumb for Mechanical Engineers Resonance: When the frequency of the excitation force (forcing function) is equal to or very close to the natural frequency of a mechanical ... [ = mment of inertia for cross-section L3 [ = moment ofinertia for crows&'on K1d - b-I L = total length of beam k=- E I L a2 bz = moment of inertia for cross-section L = t t l length ofbeam = ... acceleration L = height of floating body Jo = mass moment of inertia of machine about axis of oscillation L length of fluid in manometer or length of uniform rigid rod r = radius of pivoted semicircular...

Ngày tải lên: 11/08/2014, 21:21

... plastic deformation Plastic deformation is the application of force to change the shape of a material Some of the more common types of plastic deformation are shown in Figure 23 Most of these ... not be line of sight limited There are several methods to apply diffusion coatings, 274 Rules of Thumb for Mechanical Engineers the most common being the pack method although the use of CVD is ... decoration for low temperature applications 276 Rules of Thumb for Mechanical Engineers Corrosion Corrosion is a material degradation problem that can cause immediate and long-term failures of otherwise...

Ngày tải lên: 11/08/2014, 21:21

... deflections and stresses Rules of Thumb for Mechanical Engineers 324 CENTROIDS AND MOMENTS OF INERTIA FOR COMMON SHAPES Key to table notation: A = area (in.2);II = moment of inertia about axis 1-1 ... life by a factor of For cast materials, use 70% of the calculated allowable stress For forged materials, use 85% of the calculated allowable stress Estimating Fatigue Properties Often, an engineer ... 100% of the proof load [14] Using 100% of the proof strength reduces the number of bolts and generally reduces the alternating load on the bolt, Le., increases the fatigue life However, for joints...

Ngày tải lên: 11/08/2014, 21:21

... cracks generally coalesce into a single large crack For cases of uniform stress, the tendency is towards a single crack 348 Rules of Thumb for Mechanical Engineers NONMETAUIC MATERIALS This chapter ... curves are calculated for each type of failure When this information is used to calculate the life of a component, its total probability of survival is the product of its POS for surface and volume ... abwrb the x-rays Figure Radiographic inspection for cracks 346 Rules of Thumb for Mechanical Engineers Bad Weld Good Weld Figure 24 Radiography is often used to inspect welds Ultrasonic Inspection...

Ngày tải lên: 11/08/2014, 21:21

... pascal pascal pascal pascal n/m2 atmosphere bar cm of Hg (OOC) in of Hg (OOC) in of H (4°C) dyne/cm2 (table continued on next page) 398 Rules of Thumb for Mechanical Engineers Category Multiply B Y ... the cash inflows and outflows of the company (or other accounting entity) for the same time period as the income statement This statement’s purpose 392 Rules of Thumb for Mechanical Engineers is ... analysis, 384-385 decision tree analysis, 385-388 time value of money 402 Rules of Thumb for Mechanical Engineers energy equation, moment -of- momentum equation, momentum equation, boundary layer concepts,...

Ngày tải lên: 11/08/2014, 21:21

... plastic deformation Plastic deformation is the application of force to change the shape of a material Some of the more common types of plastic deformation are shown in Figure 23 Most of these ... other treatments such as ausforming and ausquenching For a more detailed description of these 264 Rules of Thumb for Mechanical Engineers Table wpical Mechanical Properties of Heat-Treated 4140 and ... and is formed during cool-down from the melt It can be used as a wear-resistant surface if the rest of the casting can be ductilized by perhaps forming gray cast iron 266 Rules of Thumb for Mechanical...

Ngày tải lên: 13/08/2014, 17:20

... the plastic moduli for a number of cross-sections .For the rectangular section of Figure 20, the & plastic moment is equal to Gvi& x (bh2/4),or 1.5 x h 308 Rules of Thumb for Mechanical Engineers ... applications For example, if weight is not a 306 Rules of Thumb for Mechanical Engineers consideration and material cost is low, large factors of safety can be employed to reduce the risk of failure ... modification of moving the condensate drain from the side to the lowest point of the shell would prevent water from accumulating in the bottom of the 3] shell [ 292 Rules of Thumb for Mechanical...

Ngày tải lên: 13/08/2014, 17:20

... back the terest) for a k e d length of time Loans, mortgages, and leas- es can therefore be considered “reverse” annuities, as shown by the cash f o diagrams lw Rules of Thumb for Mechanical Engineers ... practical to obtain tubing of that size o to machine the required holes In addition, if the flow r field consists of highly viscous oil or air with high partic- 362 Rules of Thumb for Mechanical Engineers ... a source of error It is a good rule of thumb not to allow changes in the static pressure port diameter to occur within a length of 2.5 times the static pressure port diameter itself For example,...

Ngày tải lên: 13/08/2014, 17:20