Why NASA uses water to suppress rocket launch noise and heat

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View profile for Jon Bradshaw

Self employed32K followers

Why would NASA bother dumping nearly half a million gallons of water during a rocket launch only for it to dissipate as steam? The answer lies in the system's name: sound and fire suppression. Fire suppression is easy to understand: The combustion of rocket fuel generates an enormous amount of heat, which can seriously damage the surface of the launchpad. Jets of water create a protective layer of steam between the rocket and the launchpad's surface, mitigating the damage. Sound suppression is something most people don't realize the need for, but the sound waves generated by a rocket launch can do even more damage than the heat. Rockets are really, really loud, reaching 200 decibels, which is significantly higher than the decibel level of a jet plane. Sound waves from recent SpaceX Starship rocket launches have set off car alarms as far as 10 miles away! For NASA, a major concern is that the powerful acoustic energy from a rocket launch could damage delicate equipment onboard the craft, putting billions of dollars and, more importantly, the safety of any crew members at risk. Blasting the launchpad with water effectively creates a cushion to absorb some of that energy, and with it, NASA can knock a launch from 200 dB, all the way down to 142 dB.

Before every rocket launch, NASA employs a critical safety measure known as the Sound Suppression System, which involves releasing approximately 450,000 gallons of water in a matter of seconds. This deluge is not for show but serves a vital purpose: to protect the rocket, its payload, and the launch platform from the intense acoustic energy and heat generated during liftoff. When a rocket’s engines ignite, they produce powerful sound waves and extreme temperatures that can reach up to 6,000°F (3,315°C). Without mitigation, these forces could cause significant structural damage, potentially compromising the rocket or even leading to catastrophic failure.

Jacob Deline

ETC LTD950 followers

5mo

Look at the damage of the launch pad in 2023 by Starship. Water deluge is a simple and proven protection. Well done bringing up an interesting, long standing, novel solution.

Daniel Israel

Wall Street Copywriter7K followers

5mo

It's fascinating to see how such a massive display of water is actually a testament to meticulous engineering, creating a vital buffer for every launch. This reminds me that sometimes the most powerful solutions involve cleverly redirecting energy, like a controlled wave, to protect what truly matters. It encourages us to think about inventive ways to manage intense forces, ensuring success and safety.

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Brian Bayliss

Bayliss Power2K followers

5mo

at 129db it will break your eardrums if you are to close to the sound. The other thing is that the exhaust from the non solid fuel rockets of the hydrogen and oxygen mix is actually super critical steam condensing turning into the white clouds .

stephen kwok

Tracino Eco Ltd1K followers

5mo

can they use sea water for cheaper cost? I notice the water is in green colour, looks like those water pool in summer time.

Dirk Feinauer

Feinauer Commercial Lawyers3K followers

5mo

Good thing we have unlimited water supplies.

Philippe Davidson, Ph.D.

Novadex Ratings, Inc.1K followers

5mo

200 decibels could be fatal.

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Gilbert B.

Guardian Estates Pty Ltd2K followers

5mo

Thank you for sharing.

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