Admin at 21:36, 7 July 2025

2025-07-07T21:36:11Z

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	~~= Meco Branches =~~

	Branches connect nodes and represent flow paths through the rocket engine system. They model pipes, ducts, valves, and other flow connections with detailed fluid dynamics.		Branches connect nodes and represent flow paths through the rocket engine system. They model pipes, ducts, valves, and other flow connections with detailed fluid dynamics.

Admin: Created page with "= Meco Branches = Branches connect nodes and represent flow paths through the rocket engine system. They model pipes, ducts, valves, and other flow connections with detailed fluid dynamics. == Overview == The Meco Rocket Simulator supports 4 different branch types: {| class="wikitable" |- ! Branch Type !! System !! Controllable !! Geometries !! Fittings Support |- | Branch || Liquid || No || Circle, Rect, Annulus || Yes |- | BranchGas || Gas || No || Circle, Rect ||..."

2025-07-07T21:16:48Z

Created page with "= Meco Branches = Branches connect nodes and represent flow paths through the rocket engine system. They model pipes, ducts, valves, and other flow connections with detailed fluid dynamics. == Overview == The Meco Rocket Simulator supports 4 different branch types: {| class="wikitable" |- ! Branch Type !! System !! Controllable !! Geometries !! Fittings Support |- | Branch || Liquid || No || Circle, Rect, Annulus || Yes |- | BranchGas || Gas || No || Circle, Rect ||..."

New page

= Meco Branches =

Branches connect nodes and represent flow paths through the rocket engine system. They model pipes, ducts, valves, and other flow connections with detailed fluid dynamics.

== Overview ==

The Meco Rocket Simulator supports 4 different branch types:

{| class="wikitable"
|-
! Branch Type !! System !! Controllable !! Geometries !! Fittings Support
|-
| Branch || Liquid || No || Circle, Rect, Annulus || Yes
|-
| BranchGas || Gas || No || Circle, Rect || No
|-
| BranchValve || Liquid || Yes || Circle only || Yes
|-
| BranchGasValve || Gas || Yes || Circle only || No
|}

== Common Parameters ==

All branches share these core parameters:
* <code>name</code> - Component name (string)
* <code>node_i</code> - Inlet node name (string)
* <code>node_j</code> - Outlet node name (string)
* <code>length</code> - Branch length in meters (double)
* <code>roughness</code> - Wall roughness in meters (double)
* <code>n</code> - Number of parallel branches (integer)

== Geometry Types ==

=== Circle ===
* '''dimType:''' <code>"Circle"</code>
* '''Parameters:'''
** <code>dimA</code> - Diameter in meters (double)

=== Rectangle ===
* '''dimType:''' <code>"Rect"</code>
* '''Parameters:'''
** <code>dimA</code> - Width in meters (double)
** <code>dimB</code> - Height in meters (double)

=== Annulus ===
* '''dimType:''' <code>"Annulus"</code>
* '''Parameters:'''
** <code>dimA</code> - Outer diameter in meters (double)
** <code>dimB</code> - Inner diameter in meters (double)

== Branch Types ==

=== Branch (Liquid) ===
* '''Type:''' <code>Branch</code>
* '''Purpose:''' Standard liquid flow branch with optional fittings
* '''Supported Geometries:''' Circle, Rect, Annulus
* '''Additional Parameters:'''
** <code>fittings</code> - Array of fitting types (optional)

'''Example JSON:'''
<pre>
{
"name": "LH HP Line",
"category": 2,
"type": "Branch",
"dimType": "Circle",
"dimA": 0.055,
"length": 1.5,
"node_i": "LH HP Joint",
"node_j": "LH HP Junction",
"roughness": 0.00003,
"fittings": ["Elbow45", "Elbow90"],
"n": 1
}
</pre>

=== BranchGas ===
* '''Type:''' <code>BranchGas</code>
* '''Purpose:''' Gas flow branch (no fittings support)
* '''Supported Geometries:''' Circle, Rect (Annulus not supported)
* '''Limitations:''' No fittings support

'''Example JSON:'''
<pre>
{
"name": "TC Throat",
"category": 2,
"type": "BranchGas",
"dimType": "Circle",
"dimA": 0.127,
"length": 0.038558466155904414,
"node_i": "TC Throat Joint",
"node_j": "TC Nozzle Joint",
"roughness": 0.00003,
"n": 1
}
</pre>

=== BranchValve ===
* '''Type:''' <code>BranchValve</code>
* '''Purpose:''' Controllable valve for liquid systems
* '''Supported Geometries:''' Circle only
* '''Features:''' Supports fittings, controllable via control parameters

'''Example JSON:'''
<pre>
{
"name": "Main Valve",
"category": 2,
"type": "BranchValve",
"dimType": "Circle",
"dimA": 0.08,
"length": 0.2,
"node_i": "Manifold",
"node_j": "Engine Inlet",
"roughness": 0.00003,
"fittings": ["ValveBall"],
"n": 1
}
</pre>

=== BranchGasValve ===
* '''Type:''' <code>BranchGasValve</code>
* '''Purpose:''' Controllable valve for gas systems
* '''Supported Geometries:''' Circle only
* '''Features:''' Controllable via control parameters, no fittings support

'''Example JSON:'''
<pre>
{
"name": "Gas Control Valve",
"category": 2,
"type": "BranchGasValve",
"dimType": "Circle",
"dimA": 0.05,
"length": 0.1,
"node_i": "Gas Manifold",
"node_j": "Nozzle Inlet",
"roughness": 0.00003,
"n": 1
}
</pre>

== Supported Fittings ==

Available for Branch and BranchValve types:

=== Flow Obstructions ===
* '''TankBaffles''' - Tank internal baffles
* '''ValveBall''' - Ball valve
* '''ValveButterfly''' - Butterfly valve
* '''ValveCheckSwing''' - Swing check valve

=== Directional Changes ===
* '''Elbow90''' - 90-degree elbow
* '''Elbow45''' - 45-degree elbow
* '''Elbow180''' - 180-degree return bend

=== Junctions ===
* '''TeeElbow''' - Tee with flow turning
* '''TeeFlowThrough''' - Straight-through tee

'''Fitting Usage Example:'''
<pre>
"fittings": [
"Elbow45",
"Elbow90",
"ValveBall",
"TeeFlowThrough"
]
</pre>

== Design Guidelines ==

=== Flow Sizing ===
# Size pipes for reasonable velocities (2-10 m/s for liquids, 50-200 m/s for gases)
# Consider pressure drop through fittings and length
# Use parallel branches (n > 1) for high flow rates

=== Geometry Selection ===
# '''Circle:''' Most common, best for pressure applications
# '''Rectangle:''' For compact installations, non-pressure applications
# '''Annulus:''' For cooling channels, coaxial configurations

=== Roughness Values ===
# '''Smooth pipes:''' 0.000015 m (15 microns)
# '''Commercial steel:''' 0.000045 m (45 microns)
# '''Cast iron:''' 0.00026 m (260 microns)
# '''Concrete:''' 0.0015 m (1.5 mm)

=== Valve Control ===
# Use BranchValve/BranchGasValve for controllable flow restrictions
# Connect to [[Meco Control Parameters|Control Parameters]] for dynamic operation
# Consider valve authority and rangeability in sizing

== Common Applications ==

* '''Feed Lines:''' Connect tank outlets to pump inlets
* '''High Pressure Lines:''' Connect pump outlets to injectors
* '''Gas Lines:''' Connect gas generators to turbine inlets
* '''Cooling Channels:''' Use annular geometry for regenerative cooling
* '''Control Valves:''' Use valve types for throttling and shutoff
* '''Nozzles:''' Use gas branches for converging-diverging nozzle sections

== Performance Considerations ==

* Fittings add significant pressure drop - use sparingly
* Multiple parallel branches (n > 1) reduce pressure drop
* Gas branches handle compressible flow with choking
* Valve branches enable dynamic flow control during simulation

== See Also ==

* [[Meco Rocket Simulator Components Overview|Main Components Overview]]
* [[Meco Nodes|Node Components]]
* [[Meco Control Parameters|Control Parameters]]
* [[Meco Machinery|Machinery Components]]
* Fluid Dynamics Reference
* Pipe Sizing Guidelines

[[Category:Meco Components]]
[[Category:Rocket Simulation]]

Meco Branches - Revision history

Admin at 21:36, 7 July 2025