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The height of the hydraulic jump, similar to length, is useful to know when designing waterway structures like settling basins or spillways. The height of the hydraulic jump is simply the difference in flow depths prior to and after the hydraulic jump. The height can be determined using the Froude number and upstream energy. Equations:
Hydraulic jump characteristics [7] [8] [13] [15] Amount upstream flow is supercritical (i.e., prejump Froude Number) Ratio of height after to height before jump Descriptive characteristics of jump Fraction of energy dissipated by jump [11] ≤ 1.0: 1.0: No jump; flow must be supercritical for jump to occur: none 1.0–1.7: 1.0–2.0: Standing ...
A pressure pad can be used to measure the time it takes for an athlete to complete a jump, and then using a kinematics equation (h = g × t 2 /8), the computer can calculate their vertical jump based on the time in the air. A second, more efficient and correct method is to use an infrared laser placed at ground level. When an athlete jumps and ...
In the example jump-off, the final cleared height is 1.88m, at which A B C and D each have one failure. D has two failures at lower heights compared to one each for the other three, who proceed to a jump-off at the next height above the final cleared height. C is eliminated in the second round of the jump-off 1.89m, then B wins in the third round.
Jump-discontinuity in acceleration can be modeled using a Dirac delta function in jerk, scaled to the height of the jump. Integrating jerk over time across the Dirac delta yields the jump-discontinuity. For example, consider a path along an arc of radius r, which tangentially connects to a straight line. The whole path is continuous, and its ...
In the mild reach, the hydraulic jump occurs downstream of the gate, but in the steep reach, the hydraulic jump occurs upstream of the gate. It is important to note that the gradually varied flow equations and associated numerical methods (including the standard step method) cannot accurately model the dynamics of a hydraulic jump. [6]
On Earth, additional height of fresh water adds a static pressure of about 9.8 kPa per meter (0.098 bar/m) or 0.433 psi per foot of water column height. The static head of a pump is the maximum height (pressure) it can deliver. The capability of the pump at a certain RPM can be read from its Q-H curve (flow vs. height).
A jump harness is often employed in training quads. [51] Quads require an average rotational frequency of around 340 rpm, with the peak rotational frequency usually exceeding 400 rpm. [52] The optimum height is estimated to be around 51 cm (20 in); [53] however, most skaters rarely go above 46 cm