Question 2 A self-propelled underwater device is tested in a laboratory equipped with a channel filled...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Question 2 A self-propelled underwater device is tested in a laboratory equipped with a channel filled with fresh water at 30°C (density 992 kg/m³ and dynamic viscosity 7.97x104 Pa.s). The cylinder-shaped device is 20 cm in diameter and 2.4 m long, as shown in Figure 1. For a flow speed of 1.6 m/s, the total drag force acting on the device is experimentally measured as 4.876 N. nose - direction of device's motion 20 cm (c) 2.4 m Figure 1 tail (a) Assuming that the total drag coefficient of the device remains constant, determine the value of total drag force acting on the device when it travels at 1.8 m/s in seawater at 0°C (density 1028 kg/m³ and dynamic viscosity 1.9x10-³ Pa.s). (4 Marks) propeller (b) Without any calculation, explain why the total drag coefficient of the device would actually be different in the laboratory experiment and the situation in the sea. (3 Marks) Page 1 of 4 Would it be preferable to use the planform area or frontal area of the device as the reference area to estimate the total drag coefficient. Justify your answer. (3 Marks) (Total: 10 Marks) Question 2 A self-propelled underwater device is tested in a laboratory equipped with a channel filled with fresh water at 30°C (density 992 kg/m³ and dynamic viscosity 7.97x104 Pa.s). The cylinder-shaped device is 20 cm in diameter and 2.4 m long, as shown in Figure 1. For a flow speed of 1.6 m/s, the total drag force acting on the device is experimentally measured as 4.876 N. nose - direction of device's motion 20 cm (c) 2.4 m Figure 1 tail (a) Assuming that the total drag coefficient of the device remains constant, determine the value of total drag force acting on the device when it travels at 1.8 m/s in seawater at 0°C (density 1028 kg/m³ and dynamic viscosity 1.9x10-³ Pa.s). (4 Marks) propeller (b) Without any calculation, explain why the total drag coefficient of the device would actually be different in the laboratory experiment and the situation in the sea. (3 Marks) Page 1 of 4 Would it be preferable to use the planform area or frontal area of the device as the reference area to estimate the total drag coefficient. Justify your answer. (3 Marks) (Total: 10 Marks)
Expert Answer:
Answer rating: 100% (QA)
Answer a The total drag force acting on the device at 18 ms in seawater at 0C can be calculated as f... View the full answer
Related Book For
Posted Date:
Students also viewed these mechanical engineering questions
-
The manager of a firm wants to implement a two-part pricing for a product having two different types of consumers. The market has 10 consumers with a lower willingness to pay with a demand curve...
-
You are employed as a risk manager for RTH Consulting. Upon your arrival, Dr Kidwell Mahlangu, the CEO has requested you to report on the possible reasons why there are continuous conflicts amongst...
-
For this project, your team is required to create a Wiki describing two project management software (PMS) tools for the department of computing final year students to assist them in selecting one for...
-
Coronado Industries has adopted the following production budget for the first 4 months of 2022. Each unit requires 4 pounds of raw materials costing $6 per pound. On December 31, 2021, the ending raw...
-
The oxidation state is common for almost all the transition metals. Suggest an explanation.
-
Determine the input conditions needed to cause the output in Figure 3-59 to go to its active state. Figure 3-59 A B C DE E. X
-
Mark's class just took the admission test for business school and averaged 83.4. contains the population of scores for the 10 other classes in Mark's university. How did Mark's class do?
-
Management of Mittel Rhein AG of Koln, Germany, would like to reduce the amount of time between when a customer places an order and when the order is shipped. For the first quarter of operations...
-
Let A 1 2 25 3 7. Find A-1 -3 -6 -10]
-
The trial balance of Pacilio Security Services Inc. as of January 1, 2017, had the following normal balances: Cash ................. 78 , 972 P e t t y C a s h . . . . . . . . . . . . . . . . 100 A c...
-
Below is the textabbr.txt file contents: r:are u:you ttyl:talk to you later l8:late brb:be right back lol:laughing out loud bbl:be back later tldr:too long; didn't read rofl:rolling on floor laughing...
-
In Problems 21-38, guess the requested limits. \(\lim _{n ightarrow \infty} \frac{2-3 n}{2 n}\)
-
In Problems 21-38, guess the requested limits. \(\lim _{n ightarrow \infty} \frac{5-2 n}{5 n}\)
-
Find the average and instantaneous rates of change of the functions in Problems 33-36. \(f(x)=4-3 x\) a. average for \(x=-3\) to \(x=2\) b. instantaneous at \(x=-3 \)
-
Trace the curves in Problems 27-32 onto your own paper and draw the secant line passing through \(P\) and \(Q\). Next, imagine \(h ightarrow 0\) and draw the tangent line at \(P\) assuming that \(Q\)...
-
In Problems 21-38, guess the requested limits. \(\lim _{n ightarrow \infty} \frac{1-3 n}{2 n}\)
-
Use the transaction information provided for Mike's Motors (the previous question) to create a balance sheet for Mike's Motors. Make sure to include every account that you used in the journal entries...
-
Find a polar equation for the curve represented by the given Cartesian equation. 4y 2 = x
-
A large study used records from Canadas national health care system to compare the effectiveness of two ways to treat prostate disease. The two treatments are traditional surgery and a new method...
-
An agriculture researcher wants to compare the yield of 5 corn varieties: A, B, C, D, and E. The field in which the experiment will be carried out increases in fertility from north to south. The...
-
A student wonders if tall women tend to date taller men than do short women. She measures herself, her dormitory roommate, and the women in the adjoining dorm rooms. Then she measures the next man...
-
Use economics to explain why people contribute to charities.
-
Listed in the following table are two sets of figures: the total quantity of Mexican pesos (new pesos) in circulation (the total amount of Mexican money available) and the peso price of a U.S. dollar...
-
Use economics to explain this statement: Increasing the speed limit has, to some degree, compromised highway safety on interstate roads but enhanced safety on non-interstate roads.
Study smarter with the SolutionInn App