Homework Answers
Answer d) Quadruple the speed.
Remark: Dynamic similarity means Reynolds number should be same, Reynolds number is
Re= 
vd/
=
dynamic viscosity
d= model size
v= velocity
=
density of air
As the size is 1/4 , therefore the velocity should be made 4 times to make the reynolds number constant.
Add Answer to:
2) In a wind tunnel testing of a NASCAR performance, a 14 model is used. If...
1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, a. An equation...
1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, a. An equation of k variables can be reduced to a function of k-r Pi's, where r equals the number of dimensions involved. b. An equation of k variables can be reduced to a function of r Pi's, where r equals the number of basic dimensions involved C. The theorem applies to either the MLT or the FLT dimension system. d. The theorem is based on dimensional...
a. 1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, An equation...
a. 1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, An equation of variables can be reduced to a function of A- Pis where requals the number of dimensions involved. b. An equation of variables can be reduced to a function of Pis where requals the number of basic dimensions involved e. The theorem applies to either the MLT or the FLT dimension system d. The theorem is based on dimensional homogeneity of an equation that...
You are to conduct a wind tunnel testing of a new football design. It is known...
You are to conduct a wind tunnel testing of a new football design. It is known that you need to maintain Reynold’s number, Re, and Strovhal Number, St, similarity for the testing. Based on a standard college quarterback, prototype velocity, V = 40mph and rotation, ω = 300rpm. The prototype football has a diameter of D=7inches. Due to instrumentation requirements, the model used in the wind tunnel must be twice as big as the prototype. Dmodel=14inches. a) Determine the required...
The aerodynamic characteristics of a new car are to be predicted through a wind tunnel testing....
The aerodynamic characteristics of a new car are to be predicted through a wind tunnel testing. Engineers build a one-fifth scale model of the car and placed it in the test section of the wind tunnel. The measured flow properties are given as Modet T+5°C, ?-1269kg/m 3 , ?-1.754 x 10-5 kg/m.s Prototype: T 25°C,p:1184 kg/m, ?#1.849 x 10-5 kg/mS, If the dimensional analysis results are outline as follows: V-50km/h Where, aerodynamic drag force, ? = density, V = speed,...
2. (15pts) You have been asked by a baseball manufacturer to study how certain stitching patterns...
2. (15pts) You have been asked by a baseball manufacturer to study how certain stitching patterns on a baseball prototype affect travel distance. Using principles of dynamic similarity you make a baseball model that is three times the size of a regular baseball and you place it in a wind tunnel. You remember from fluid mechanics that the Reynolds (Re) number is important to this problem (see class notes for Re number derivation) (a) What parameters must be controlled to...
Encircle the correct answer for the following questions: • What is the hydraulic diameter of a...
Encircle the correct answer for the following questions: • What is the hydraulic diameter of a rectangular air ventilation duet whose cross section is 1 m by 25 cm? (a) 25 cm (b) 40 cm (c) 100 cm (d) 75 cm (e) 50 cm Oil = 0.1kg/ms, specific gravity= 0.9] flows through a 50-m-long smooth 8-cm-diameter pipe. The maximum pressure drop for which laminar flow is expected is approximately • • (a) 40 kPa (b) 50 kPa (c) 60 kPa...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
How can we assess whether a project is a success or a failure? This case presents...
How can we assess whether a project is a success or a
failure?
This case presents two phases of a large business transformation project involving the implementation of an ERP system with the aim of creating an integrated company. The case illustrates some of the challenges associated with integration. It also presents the obstacles facing companies that undertake projects involving large information technology projects. Bombardier and Its Environment Joseph-Armand Bombardier was 15 years old when he built his first snowmobile...
1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, a. An equation of k variables can be reduced to a function of k-r Pi's, where r equals the number of dimensions involved. b. An equation of k variables can be reduced to a function of r Pi's, where r equals the number of basic dimensions involved C. The theorem applies to either the MLT or the FLT dimension system. d. The theorem is based on dimensional...
a. 1) Each of the following statements about Buckingham Pi Theorem is true, EXCEPT, An equation of variables can be reduced to a function of A- Pis where requals the number of dimensions involved. b. An equation of variables can be reduced to a function of Pis where requals the number of basic dimensions involved e. The theorem applies to either the MLT or the FLT dimension system d. The theorem is based on dimensional homogeneity of an equation that...
The aerodynamic characteristics of a new car are to be predicted through a wind tunnel testing. Engineers build a one-fifth scale model of the car and placed it in the test section of the wind tunnel. The measured flow properties are given as Modet T+5°C, ?-1269kg/m 3 , ?-1.754 x 10-5 kg/m.s Prototype: T 25°C,p:1184 kg/m, ?#1.849 x 10-5 kg/mS, If the dimensional analysis results are outline as follows: V-50km/h Where, aerodynamic drag force, ? = density, V = speed,...
2. (15pts) You have been asked by a baseball manufacturer to study how certain stitching patterns on a baseball prototype affect travel distance. Using principles of dynamic similarity you make a baseball model that is three times the size of a regular baseball and you place it in a wind tunnel. You remember from fluid mechanics that the Reynolds (Re) number is important to this problem (see class notes for Re number derivation) (a) What parameters must be controlled to...
Encircle the correct answer for the following questions: • What is the hydraulic diameter of a rectangular air ventilation duet whose cross section is 1 m by 25 cm? (a) 25 cm (b) 40 cm (c) 100 cm (d) 75 cm (e) 50 cm Oil = 0.1kg/ms, specific gravity= 0.9] flows through a 50-m-long smooth 8-cm-diameter pipe. The maximum pressure drop for which laminar flow is expected is approximately • • (a) 40 kPa (b) 50 kPa (c) 60 kPa...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
How can we assess whether a project is a success or a
failure?
This case presents two phases of a large business transformation project involving the implementation of an ERP system with the aim of creating an integrated company. The case illustrates some of the challenges associated with integration. It also presents the obstacles facing companies that undertake projects involving large information technology projects. Bombardier and Its Environment Joseph-Armand Bombardier was 15 years old when he built his first snowmobile...
Most questions answered within 3 hours.
-
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 1 hour ago -
A business executive has the option to invest money in two
plans: Plan A guarantees that...
asked 3 hours ago -
Hello, can someone please help me answer this question?
How much heat is absorbed by a...
asked 3 hours ago -
. A marketing researcher conducted a survey of 25 shoppers
randomly selected at the local mall...
asked 3 hours ago -
Create an comprehensive response to the
following:
Antimicrobial agents work on a multitude of microbes (bacteria,...
asked 3 hours ago -
6.13 LAB: Step counter. Section 6.3.
A pedometer treats walking 2,000 steps as walking 1 mile....
asked 3 hours ago -
(14.2) A block of mass m = 10 kg riding on a frictionless
horizontal plane is...
asked 3 hours ago -
Use any search engine to search for articles about Starbucks
partnership with Tata Companies in India...
asked 3 hours ago -
Let’s say that for some reason Bank Excess Reserves suddenly
increase sharply. What effect would this...
asked 4 hours ago -
Given:
Curent Assets: $600,000
Total Assets: $2,600,000
Current Liabilities: $500,000
Total Liabilities: $1,700,000
What is the...
asked 4 hours ago -
1. What is a “Bankster”? What is insider trading? Why is it
illegal?
2. What is...
asked 4 hours ago -
A transverse wave on a cord is given by
D(x,t)=0.18sin(2.7x−61.0t), where Dand x are in m...
asked 4 hours ago