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Related Concept Videos

Shock Waves01:16

Shock Waves

While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high pressures...
Hydraulic Jump01:29

Hydraulic Jump

A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
Hydraulic Jump: Problem Solving01:16

Hydraulic Jump: Problem Solving

To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
Net Change Theorem01:22

Net Change Theorem

The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application is in...
Blood Pressure Imbalances and Circulatory Shock01:24

Blood Pressure Imbalances and Circulatory Shock

Disorders affecting blood volume, vascular tone, or vascular function can disrupt vascular homeostasis, including conditions like hypertension, hemorrhage, and shock.
Blood Pressure: Hypertension and Hypotension
Normal blood pressure is 120/80 mm Hg. Elevated blood pressure is 120-129/under 80 mm Hg. Hypertension, warranting treatment at 130/80 mm Hg, is often asymptomatic and can lead to severe cardiovascular events, aneurysms, peripheral arterial disease, chronic renal disease, or cardiac...

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Related Experiment Video

Updated: May 20, 2026

Evaluating Primary Blast Effects In Vitro
10:51

Evaluating Primary Blast Effects In Vitro

Published on: September 18, 2017

Blast shock wave mitigation using the hydraulic energy redirection and release technology.

Yun Chen1, Wei Huang, Shlomi Constantini

  • 1BrightstarTech, Inc., Clarksburg, Maryland, United States of America. yun.chen@brightstartechinc.com

Plos One
|June 30, 2012
PubMed
Summary

This study introduces a hydraulic energy redirection technology using liquid-filled tubing to mitigate blast shock waves. Body armor equipped with this system reduced blast overpressure by 97%, offering enhanced protection.

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Biomedical Engineering

Background:

  • Blast shock waves pose significant threats to personnel and equipment.
  • Existing protective measures require enhancement against severe blast overpressure.
  • Novel energy dissipation mechanisms are crucial for advanced protective systems.

Purpose of the Study:

  • To develop and evaluate a hydraulic energy redirection and release technology for mitigating blast shock waves.
  • To assess the effectiveness of liquid-filled plastic tubing as a blast overpressure transformer.
  • To investigate the potential of this technology for protecting body armor and personnel.

Main Methods:

  • A hydraulic energy redirection and release system was designed using liquid-filled plastic tubing.
  • The technology was integrated into body armor samples as an outer layer.
  • Blast tests were conducted to measure blast overpressure reduction behind the body armor samples.

Main Results:

  • Blast overpressure was reduced by 97% within 0.2 milliseconds after liquid release.
  • The technology effectively transferred kinetic energy from shock waves into hydraulic energy.
  • A potential for volumetric liquid surge and its implications for remote injury were observed.

Conclusions:

  • The hydraulic energy redirection and release technology successfully mitigates blast shock waves on body armor.
  • This innovative approach shows promise for protecting civilian and military personnel against blast threats.
  • Further research is warranted to explore the full potential and safety aspects of the volumetric liquid surge.