CIVL 250

Hydraulics I

Winter 2025

Laboratory Session

Students are required to attend their scheduled laboratory session at the Queen’s University Coastal Engineering Laboratory (QCEL), located on West Campus (refer to the map posted on onQ for directions).

Please note the following important guidelines:

•    Steel toed safety shoes are mandatory to enter the lab.

•    Student attendance is mandatory – lab reports submitted by students who did not attend their laboratory session will not be graded.

Note: if there are any questions regarding the lab, please contact the lab Teaching Assistant:

Name: Paramon Koutorjevski

Email:xpp@queeensu.ca

The purpose of this laboratory session is three-fold:

1.   Examination of hydraulic circuit components: gain firsthand experience by observing the various components ofa hydraulic circuit.

2.   Exploration of hydraulic jump phenomenon: acquire insights into the hydraulic jump phenomenon by manipulating the flume’s headgate and tailgate positions, and adjusting the flow rate through the valve.

3.   Familiarization with hydraulic measurement: develop familiarity with measuring hydraulic quantities such as velocity, flow rate, and flow depth.

During the laboratory session, a comprehensive description of the hydraulic circuit components will be provided. To enhance understanding of the hydraulic jump phenomenon, students are tasked with inducing the largest possible hydraulic jump.

While in the lab, record measurements of the flume dimensions and, additionally, take the following key measurements:

1.   Flow depth (h): measure in  cross-sections both upstream and downstream of the hydraulic jump.

2.   Flow velocity at 0.4h: measure at a point 0.4 times the flow depth (h) from the flume bottom, located in the midst of the flow cross-section downstream of the hydraulic jump.

3.   Length measurements: record the length of the flow reach upstream of the hydraulic jump, the length of the hydraulic jump itself, and the length of the flow reach downstream of the hydraulic jump.

Subsequent to the laboratory session at QCEL, address the following:

a.   Sketch of hydraulic circuit: illustrate the experimental channel configuration, i.e., the hydraulic circuit components, incorporating elements such as the sump, pump(s), piping system, constant head tank, flow valve, entrance and exit chambers, diffuser, flow straighteners, headgate, tailgate, flume, mechanical jack, electrical panel, etc.

b.   Sketch of the hydraulic jump: provide a visual representation clearly indicating the values of flow depth upstream and downstream of the hydraulic jump, along with other pertinent lengths.

c.   Flow rate calculation: calculate the flow rate in the flume during your experimental session.

Deliverable: One report per lab group.

Submit a short (no more than 4 pages in total; no appendices) lab report in the form of a PDF containing the following sections:

•    Cover page: include the title of the report, the name of the author(s), course, department, and university details.

•    Introduction: state the purpose and scope of the report.

•    Methodology: briefly describe  the procedure to produce a hydraulic jump. Include details about the instruments used. The sketch of the hydraulic circuit must be included in this section.

•    Results and discussion: present the findings derived from the laboratory session. Include the sketch of the hydraulic jump alongside measured quantities, including flow depths, flow velocity, lengths of flow reaches, and flow rate. Interpret the results and discuss their significance.

•    Conclusions: reflect on whether the objectives of the laboratory session were successfully accomplished. Share insights gained from the laboratory session.

Being precise and concise is essential for engineers: therefore, any pages beyond the allotted limit will not be considered.

Marking scheme:

This lab is worth 10% on your final course grade. This percentage will be distributed as follows:

•   2.5% will be given for attending the laboratory session and actively participate during the session.

•   7.5% corresponds to the lab report.

Due date:

•   Friday, March 14th, 23:59, for students attending the lab on March 7th.

•   Friday, March 21st, 23:59, for students attending the lab on March 14th.