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Rotating detonation engine
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<p>A rotating detonation engine (RDE) uses a form of <a href="/facts/Pressure_gain_combustion/zx2hX4Xk">pressure gain combustion</a>, where one or more <a href="/facts/Detonation/C8cVTb2R">detonations</a> continuously travel around an <a href="/facts/Annulus_(mathematics)/rhxKuoem">annular</a> channel. Computational simulations and experimental results have shown that the RDE has potential in transport and other applications. </p><p>In detonative combustion, the flame front expands at <a href="/facts/Supersonic_speed/D3VpzmlC">supersonic speed</a>. It is theoretically up to 25% more efficient than conventional <a href="/facts/Deflagration/wIR4pGtC">deflagrative combustion</a>, offering potentially major fuel savings. </p><p>Disadvantages include instability and noise. </p>