sure, but it's about 1100 line of code and it's too long to be in the post directly. if u have any other better way please suggest
There is a NACA paper on pressure sensor placement to mitigate Mach shockwave fluctuations. The rule they used was, placement of sensors at a 3 caliber distance behind any transitional or protrusion into the air stream flow. In the 25 years I've used the rule, I added an additional variation for my e-bays of an additional vent at 180° with 1- 1.5 caliber difference between the two vents. I also use larger vent holes to match the expected pressure change profile.There are a couple of corner cases you should test for….in particular, if your rocket transitions beyond Mach, there is a short pressure decrease. Depending on your apogee detection algorithm, you might prematurely trigger for apogee (at Mach!!) unless you account for this.
How sensitive is your algorithm to flutter in pressure (eg if bent holes are incorrect size).
Lots of things work well in the lab, but data is ugly for real field conditions.
There is a NACA paper on pressure sensor placement to mitigate Mach shockwave fluctuations. The rule they used was, placement of sensors at a 3 caliber distance behind any transitional or protrusion into the air stream flow. In the 25 years I've used the rule, I added an additional variation for my e-bays of an additional vent at 180° with 1- 1.5 caliber difference between the two vents. I also use larger vent holes to match the expected pressure change profile.
I had a copy of the NACA paper, but I have not seen it since moving to Texas. I did locate a short NASA Tech Briefs article that also mentions placement of microphone openings 3 to 4 cylinder diameters downstream of a nosecone in subsonic vehicles for reduced noise. It does mention an alternative supersonic design in NASA ARC-12001, but no test data at Mach 1 is presented. I also have no supersonic data to validate the 3 caliber rule. I plan to correct that issue this summer.Do you happen to know the number or have a link to that paper? I've searched and come up with a lot of interesting stuff, but not that.
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