Struct BodyGeometry 

#[non_exhaustive]
pub struct BodyGeometry {
    pub length_m: f64,
    pub fore_area_m2: f64,
    pub aft_area_m2: f64,
    pub volume_m3: f64,
    pub planform_area_m2: f64,
    pub planform_centroid_m: f64,
    pub aft_angle_rad: f64,
}

The aerodynamic geometry of one body component, in its own frame (fore end at 0, stations positive aft).

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

length_m: f64

Length, m.

fore_area_m2: f64

Cross-section area at the fore end, m².

aft_area_m2: f64

Cross-section area at the aft end, m².

volume_m3: f64

Volume enclosed by the outer surface, m³.

planform_area_m2: f64

Side-view (planform) area, m².

planform_centroid_m: f64

Centroid of the planform area, m aft of the fore end.

aft_angle_rad: f64

Angle of the outer surface to the axis at the aft end, atan(dr/dx), rad: positive where the radius grows aft, and ±π/2 where the profile ends in a blunt tip (the aft end of a narrowing elliptical or Haack transition).

Implementations

impl BodyGeometry

pub fn cylinder(length_m: f64, radius_m: f64) -> Result<Self, AeroError>

A cylinder of radius_m and length_m.

Errors

AeroError::Domain for a non-positive or non-finite dimension.

pub fn from_profile(profile: &Profile) -> Result<Self, AeroError>

A nose cone’s or transition’s geometry from its outer profile, filled (hpr_design::revolve).

Errors

Numerical errors from the volume integral, and AeroError::Domain if the result is out of range.

pub fn validate(&self) -> Result<(), AeroError>

Checks that every field is finite and in range.

Errors

AeroError::Domain for a non-finite or negative value, or a length, volume or planform area that isn’t positive.

pub fn normal_force_slope(&self, reference_area_m2: f64) -> f64

Normal-force slope at α → 0, per radian: (C_Nα)_B = (2/A_ref)[A(l) − A(0)] (Barrowman 1967 eq. 3-65; Niskanen 2009 eq. 3.19). Negative for a boattail.

pub fn moment_slope_m(&self, reference_area_m2: f64) -> f64

Moment slope about the fore end at α → 0, m per radian: (C_Nα)_B X_B = (2/A_ref)[l A(l) − V] (Niskanen 2009 eq. 3.25 times the reference length).

pub fn center_of_pressure_m(&self) -> Option<f64>

Center of pressure of the potential-flow term, m aft of the fore end: X_B = [l A(l) − V] / [A(l) − A(0)] (Barrowman 1966 eq. 28; Niskanen 2009 eq. 3.28). None when the two end areas are equal, where the body has no potential-flow normal force.

pub fn lift_coefficient( &self, reference_area_m2: f64, alpha_rad: f64, factor: f64, ) -> f64

The body-lift normal-force coefficient at alpha_rad with factor factor: C_N = factor · (A_plan/A_ref) sin² α (Niskanen 2009 eq. 3.26), acting at BodyGeometry::planform_centroid_m (eq. 3.27). The factor is crate::crossflow::BodyLift::factor’s: Jorgensen’s η C_dn, or Galejs’s BODY_LIFT_K.

Trait Implementations

impl Clone for BodyGeometry

fn clone(&self) -> BodyGeometry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BodyGeometry

impl Debug for BodyGeometry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BodyGeometry

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for BodyGeometry

fn eq(&self, other: &BodyGeometry) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for BodyGeometry

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BodyGeometry