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What is the job of the acoustic cavities inside the main combustion chamber?
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I am new to rocket engines. I was looking at an image of RS-25 engine's MCC and found these acoustic cavities, and I want to know how they work. Can somebody please explain their working principle? Thank you. 
space-shuttle engines engine-design ssme combustion-chamber
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I am new to rocket engines. I was looking at an image of RS-25 engine's MCC and found these acoustic cavities, and I want to know how they work. Can somebody please explain their working principle? Thank you.
space-shuttle engines engine-design ssme combustion-chamber
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
New contributor
Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I am new to rocket engines. I was looking at an image of RS-25 engine's MCC and found these acoustic cavities, and I want to know how they work. Can somebody please explain their working principle? Thank you.
space-shuttle engines engine-design ssme combustion-chamber
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
New contributor
Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I am new to rocket engines. I was looking at an image of RS-25 engine's MCC and found these acoustic cavities, and I want to know how they work. Can somebody please explain their working principle? Thank you.
space-shuttle engines engine-design ssme combustion-chamber
space-shuttle engines engine-design ssme combustion-chamber
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
New contributor
Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
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Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 9 hours ago
Aungmyintmyat Hane
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
New contributor
Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
asked 9 hours ago
Aungmyintmyat HaneAungmyintmyat Hane
313 bronze badges
313 bronze badges
New contributor
Aungmyintmyat Hane is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
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1 Answer
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They are provided to help damp out combustion instabilities.
The main injector uses cooled baffle elements, developed at Glenn in
the 1960s to control pressure waves that could destroy the engine.
Pressure waves in the space shuttle main engine combustion chamber are
also controlled by acoustic cavities. Testing by Glenn engineers
determined the most effective size and location of these cavities,
which act somewhat like cavities in acoustic ceilings.
Source
You can read more on the theory of how they work in this book Liquid Rocket Engine Combustion Instability starting at page 384.
It starts out
Acoustic cavities such as Helmholtz and quarter-wave resonators were
successfully used as damping devices for the suppression of
combustion oscillations. resonator consists of a small volume
connected with the combustion chamber through an orifice. If the
dimensions of the various resonator elements are small in comparison
to the wavelength of the oscillation, the gas motion behavior in the
resonator is analogous to a mass-spring-dashpot system.
Acoustic cavity design is also discussed in the NASA monograph Liquid Rocket Engine Combustion Stabilization Devices. It includes this figure showing some other applications.
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
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1 Answer
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$begingroup$
They are provided to help damp out combustion instabilities.
The main injector uses cooled baffle elements, developed at Glenn in
the 1960s to control pressure waves that could destroy the engine.
Pressure waves in the space shuttle main engine combustion chamber are
also controlled by acoustic cavities. Testing by Glenn engineers
determined the most effective size and location of these cavities,
which act somewhat like cavities in acoustic ceilings.
Source
You can read more on the theory of how they work in this book Liquid Rocket Engine Combustion Instability starting at page 384.
It starts out
Acoustic cavities such as Helmholtz and quarter-wave resonators were
successfully used as damping devices for the suppression of
combustion oscillations. resonator consists of a small volume
connected with the combustion chamber through an orifice. If the
dimensions of the various resonator elements are small in comparison
to the wavelength of the oscillation, the gas motion behavior in the
resonator is analogous to a mass-spring-dashpot system.
Acoustic cavity design is also discussed in the NASA monograph Liquid Rocket Engine Combustion Stabilization Devices. It includes this figure showing some other applications.
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
$endgroup$
add a comment |
$begingroup$
They are provided to help damp out combustion instabilities.
The main injector uses cooled baffle elements, developed at Glenn in
the 1960s to control pressure waves that could destroy the engine.
Pressure waves in the space shuttle main engine combustion chamber are
also controlled by acoustic cavities. Testing by Glenn engineers
determined the most effective size and location of these cavities,
which act somewhat like cavities in acoustic ceilings.
Source
You can read more on the theory of how they work in this book Liquid Rocket Engine Combustion Instability starting at page 384.
It starts out
Acoustic cavities such as Helmholtz and quarter-wave resonators were
successfully used as damping devices for the suppression of
combustion oscillations. resonator consists of a small volume
connected with the combustion chamber through an orifice. If the
dimensions of the various resonator elements are small in comparison
to the wavelength of the oscillation, the gas motion behavior in the
resonator is analogous to a mass-spring-dashpot system.
Acoustic cavity design is also discussed in the NASA monograph Liquid Rocket Engine Combustion Stabilization Devices. It includes this figure showing some other applications.
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
$endgroup$
add a comment |
$begingroup$
They are provided to help damp out combustion instabilities.
The main injector uses cooled baffle elements, developed at Glenn in
the 1960s to control pressure waves that could destroy the engine.
Pressure waves in the space shuttle main engine combustion chamber are
also controlled by acoustic cavities. Testing by Glenn engineers
determined the most effective size and location of these cavities,
which act somewhat like cavities in acoustic ceilings.
Source
You can read more on the theory of how they work in this book Liquid Rocket Engine Combustion Instability starting at page 384.
It starts out
Acoustic cavities such as Helmholtz and quarter-wave resonators were
successfully used as damping devices for the suppression of
combustion oscillations. resonator consists of a small volume
connected with the combustion chamber through an orifice. If the
dimensions of the various resonator elements are small in comparison
to the wavelength of the oscillation, the gas motion behavior in the
resonator is analogous to a mass-spring-dashpot system.
Acoustic cavity design is also discussed in the NASA monograph Liquid Rocket Engine Combustion Stabilization Devices. It includes this figure showing some other applications.
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
$endgroup$
They are provided to help damp out combustion instabilities.
The main injector uses cooled baffle elements, developed at Glenn in
the 1960s to control pressure waves that could destroy the engine.
Pressure waves in the space shuttle main engine combustion chamber are
also controlled by acoustic cavities. Testing by Glenn engineers
determined the most effective size and location of these cavities,
which act somewhat like cavities in acoustic ceilings.
Source
You can read more on the theory of how they work in this book Liquid Rocket Engine Combustion Instability starting at page 384.
It starts out
Acoustic cavities such as Helmholtz and quarter-wave resonators were
successfully used as damping devices for the suppression of
combustion oscillations. resonator consists of a small volume
connected with the combustion chamber through an orifice. If the
dimensions of the various resonator elements are small in comparison
to the wavelength of the oscillation, the gas motion behavior in the
resonator is analogous to a mass-spring-dashpot system.
Acoustic cavity design is also discussed in the NASA monograph Liquid Rocket Engine Combustion Stabilization Devices. It includes this figure showing some other applications.
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
edited 8 hours ago
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
answered 9 hours ago
Organic MarbleOrganic Marble
69.1k4 gold badges199 silver badges295 bronze badges
69.1k4 gold badges199 silver badges295 bronze badges
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Aungmyintmyat Hane is a new contributor. Be nice, and check out our Code of Conduct.
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