A model test of a tractor-trailer platform is carried out in a wind tunnel. The drag force, FD, is found to depend on the frontal area A, the wind speed V, the air density p, and the air viscosity u. The scale of the model is 1: 4; The front area of the model is 7 ft2. Obtain a set of dimensionless parameters suitable for characterizing the model test results. Indicate the conditions necessary to obtain dynamic similarity between the model and prototype flows. When tested at a wind speed V = 300 ft / s in standard air, the drag force measured on the model was FD = 550 Ibf. Assuming dynamic similarity, estimate the aerodynamic drag force on the large-scale vehicle at V = 75 ft / s. Calculate the power required to overcome this drag force if there is no wind.
A model test of a tractor-trailer platform is carried out in a wind tunnel. The drag force, FD, is found to depend on the frontal area A, the wind speed V, the air density p, and the air viscosity u. The scale of the model is 1: 4; The front area of the model is 7 ft2. Obtain a set of dimensionless parameters suitable for characterizing the model test results. Indicate the conditions necessary to obtain dynamic similarity between the model and prototype flows. When tested at a wind speed V = 300 ft / s in standard air, the drag force measured on the model was FD = 550 Ibf. Assuming dynamic similarity, estimate the aerodynamic drag force on the large-scale vehicle at V = 75 ft / s. Calculate the power required to overcome this drag force if there is no wind.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:A model test of a tractor-trailer platform is carried out
in a wind tunnel. The drag force, FD, is found to
depend on the frontal area A, the wind speed V, the
air density p, and the air viscosity u. The scale of the
model is 1: 4; The front area of the model is 7 ft2.
Obtain a set of dimensionless parameters suitable for
characterizing the model test results. Indicate the
conditions necessary to obtain dynamic similarity
between the model and prototype flows. When
tested at a wind speed V = 300 ft / s in standard air,
the drag force measured on the model was FD = 550
Ibf. Assuming dynamic similarity, estimate the
aerodynamic drag force on the large-scale vehicle at
V = 75 ft / s. Calculate the power required to
overcome this drag force if there is no wind.
%3D
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 6 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning