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Located behind the fan blades, in the bypass duct (where the air that does not enter the compressor travels), are stators called Outlet Guide Vanes (OGVs). Since the fan blades are rotating, they make the airflow swirl in the direction of the rotation as it passes the fan blades (much like how the propeller airflow swirls around the fuselage of a single-engine, piston airplane).
This swirling airflow now has less momentum dedicated to thrusting the airplane forward because the total-momentum vector is split into two smaller vectors at 90° from each other; one vector is pointed to the rear of the engine, and the other vector is pointed to the side of the engine in the direction of fan rotation (think about the loss of vertical lift as the lift vector is split into vertical and horizontal vectors when an airplane begins to turn). OGVs are used to remove the swirl (eliminate the momentum vector that points to the side of the engine); thus, straightening the airflow to regain the momentum that is used for thrust.
These OGVs are a large source of the engine noise that you hear in the video. Each fan blade grabs a chunk of air and pushes it back. These chunks all slap against the OGVs. This is the "chopping noise" that you hear. The interaction between unsteady fan airflow and the OGVs also produces the rumbling sound. The intensity of the sounds will vary with the number and rotation speed of the fan blades.
What else can I help you with?
What does a Boeing 777 plane sound like?
A high pitched scream
Your clio sounds like its exhaust is blowing or do they sound like that?
can you let me if my car should sound like a racing car
What are the dimensions of a Boeing B-52 fuselage?
whenever a child drive any vehicle model like airplane he says Boeing Boeing
Why were Boeing employees unhappy?
Longtime Boeing employees complained of a reverse takeover, bitterly joking that McDonnell Douglas had purchased Boeing with Boeing's own money. They did not like Stonecipher's harsh style
Why does your van sound like a jet taking off as you accelerate?
The fan clutch is locked up.
Who made gliders that looked like birds?
Boeing
What are the different type of planes?
There are millions of types like Boeing 737 Boeing 707 bombardier CRJ700 etc there are just lots
Why does car sound like airplane?
A car that sounds like an airplane could be due to a problem with the exhaust system or the engine. It could be a result of a leaking exhaust manifold gasket or a damaged muffler. It's important to have the car inspected by a mechanic to identify and address the issue to prevent any further damage.
Which sound format supports the highest resolution sound with the least compression?
Dolby TrueHD, if you are taking the Best Buy Learning Lounge like I assume you are. :)
Does waking have a long or short vowel sound?
It has a long A sound, the same as wake. It rhymes with baking and taking.
Does it rain in the Boeing plant in Seattle?
I've been to the Boeing Plant so when it rains in Seattle, which is like 5min away, It rains in the outside areas of the Boeing plant. They can't control the weather outside!
Who sings born to be wasted?
009 sound system, i really love that song, especially when ur like playing a racing game or just drivin haha
