Nozzle Air Entrainment - The Cause and Effect

We have recently produced a video series discussing Nozzle Air Entrainment for firefighters. In this series we took a look at 3 pairs of tests for a total of 6 videos. In this video we take an in depth look at nozzle air entrainment and hope this overall instructional video sheds a little light on the topic. Remember, you can reference the other test videos by viewing them in the overall Nozzle Air Entrainment Playlist. We will provide that playlist at the bottom of this article, but you will also be able to find the playlist on our website by clicking here or on our YouTube channel.

Nozzle Air Entrainment - The Cause and Effect

https://www.youtube.com/watch?v=aASbS63Ki4o

If you missed the other videos you can find them in our playlist below:

https://www.youtube.com/playlist?list=PL4NKqZJ7joymMNcArOH8teKL_c2u6X3KJ

Nozzle Air Entrainment Round 3 - Video Series

This is the third round of videos in our Nozzle Air Entrainment Video Series. In this round of test videos we will look at interior ventilated attacks with both the fog nozzle and the smoothbore nozzle. If you haven't seen the first or second round of tests you can view them by clicking here: First Round, Second Round

TEST 5 - Fog Nozzle Ventilated Attack

https://www.youtube.com/watch?v=bI4wdp3dvf4

TEST 6 - Smoothbore Nozzle Ventilated Attack

https://www.youtube.com/watch?v=GXpHMxxjr4Q

Thank you for watching. Keep an eye out for the next video in this series which will recap all the test and review the nozzle types and attack methods. We will also include some thermal imaging footage during some test burns. If you would like to view the entire playlist on YouTube you can view it below:

The Entire Nozzle Air Entrainment Playlist:

https://www.youtube.com/playlist?list=PL4NKqZJ7joymMNcArOH8teKL_c2u6X3KJ

Nozzle Air Entrainment Round 2 - Video Series

This is the second round of videos from our Nozzle Air Entrainment Video Series. In these two videos we will look at the interior attack of a vent limited situation. This will give you a good idea of how a nozzle can over pressurize a space regardless of fire or heat. This is simply air entrainment causing this over pressurization. We will use two videos, one for the smoothbore and one for the fog nozzle. This will pick up where we left off with Tests 1 & 2. If you haven't seen the first two tests click here to watch those videos.

TEST 3 - Fog Nozzle Interior Attack Vent Limited

https://www.youtube.com/watch?v=MKWrYKUIvpc

TEST 4 - Smoothbore Nozzle Interior Attack Vent Limited

https://www.youtube.com/watch?v=2q-CaiklzyI

Thank you for watching and keep an eye out for the next round of videos. We still have two more experiments to go and will release those next week.

If you would like to view all of the videos in the video series you can see them below in our playlist:

Entire Nozzle Air Entrainment Playlist

https://www.youtube.com/playlist?list=PL4NKqZJ7joymMNcArOH8teKL_c2u6X3KJ

Nozzle Air Entrainment - Video Series

Today we have released the beginning of a 7 part video series on Nozzle Air Entrainment. These videos will walk through some of the basic concepts of nozzle air entrainment and how you can deliver some hands-on practical drills demonstrating air entrainment with various nozzle types. We will release all of these videos over the next few weeks so keep an eye out as we move along. You will see below Test 1 and 2 which will begin our video series.

TEST 1

Test 1 is an exterior attack through a window using a fog nozzle. We will begin the attack with a straight stream directed at the ceiling and then move the pattern through 30 degrees and towards full fog. You will see a drastic increase in air entrainment as we change the pattern of the nozzle. This fog nozzle was flowing 125 GPM at 100 psi nozzle pressure.

https://www.youtube.com/watch?v=k1xpO9Es2nY

Test 2

Test 2 is the same test but we are using a 7/8" smoothbore nozzle. You will see a decrease in the air entrainment even with the increase in flow. This 7/8" tip was flowing 160 GPM at 50 psi nozzle pressure.

https://www.youtube.com/watch?v=EOmyrJEpIZw

You will see several more of these tests coming out over the next few weeks. The next tests include interior attacks both ventilated and non ventilated.

If you would like to view all of the videos in the video series you can see them below in our playlist:

Entire Nozzle Air Entrainment Playlist

https://www.youtube.com/playlist?list=PL4NKqZJ7joymMNcArOH8teKL_c2u6X3KJ