We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a Flame Holder?

Mary McMahon
Updated May 23, 2024
Our promise to you
WikiMotors is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WikiMotors, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A flame holder is used inside a rocket, jet, or similar engine to maintain combustion. It creates a small area of reduced activity to prevent high wind from putting the flame out so fuel can steadily combust to generate rapidly expanding air and thrust. A number of factors are incorporated o into flame holder design, especially with sophisticated and expensive engines. Hobbyists occasionally need to make flame holders for projects like home rockets, which have much more forgiving engine tolerances than space shuttles and commercial aircraft.

Classically, the flame holder consists of a cylinder with some air holes in it to allow air to form an eddy. Currents of air moving through the engine swirl around the device, leaving a void in the middle where a flame can burn. As fuel is combusted, it elevates the air temperature around the flame holder. Rapidly heating air expands to generate thrust, while the high heat ignites incoming fuel to keep the engine continually running.

There are some other shapes and designs that may be considered for come applications. One option is a V, with the point of the V facing the direction of inward air flow, or an H design, which provides a slightly different kind of air current. Some aircraft use cavities, where the air flows over the flame while it’s maintained in the base of the cavity. In all cases, a fuel nozzle is located near the air holder to keep up a continuous supply of new fuel for combustion.

Careful calculation of the fuel/air mixture is needed to keep the flame going and maintain the engine’s operating conditions. The air holder helps control the movement of air currents inside a primary engine or afterburner, while fuels are carefully mixed to provide optimum performance. Engines that operate in this way can use high volumes of fuel with each flight in a tradeoff for power and speed. This can be critical for military aircraft or long-haul planes that rely on jet engines.

Problems with flame holder design can lead to the malfunctioning of an engine that may interfere with the performance of the aircraft. Most seriously, there is a risk that the flame in the combustion chamber will go out. If a flameout occurs, the engine can no longer operate until the flame is reignited. A number of measures are used to address this concern, including carefully engineering flame holders and other engine components, and training pilots in how to respond to such situations quickly.

WikiMotors is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a WikiMotors researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

Learn more
WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.

WikiMotors, in your inbox

Our latest articles, guides, and more, delivered daily.