Struct DragConditions 

#[non_exhaustive]
pub struct DragConditions {
    pub reynolds_per_m: f64,
    pub thrusting: bool,
    pub thrusting_motor_area_m2: f64,
    pub thrusting_pod_motor_areas_m2: [f64; 4],
}

What the drag buildup needs beyond the crate::Flow.

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.

reynolds_per_m: f64

Freestream Reynolds number per meter, V/ν, 1/m. The buildup multiplies it by the rocket’s length (Niskanen 2009 eq. 3.12, p. 42).

thrusting: bool

Whether a motor is thrusting. It selects an override table’s power-on curve.

thrusting_motor_area_m2: f64

Total cross-section area of the motors thrusting into the aft base, m², subtracted from the base area (Niskanen 2009 pp. 50–51). Zero while coasting. It leaves out motors in pods.

thrusting_pod_motor_areas_m2: [f64; 4]

Total cross-section area of the thrusting motors in pods, m², one total for each pod set that holds motor mounts, in the order of hpr_design::Layout::motor_pod_sets: each pod’s share, its set’s total over the set’s pods, comes off its own base. Zero while none thrusts; at most MOTOR_POD_SETS sets.

Implementations

impl DragConditions

pub fn coasting(reynolds_per_m: f64) -> Self

Coasting at reynolds_per_m.

pub fn thrusting(reynolds_per_m: f64, motor_area_m2: f64) -> Self

Thrusting at reynolds_per_m, with motors of total cross-section motor_area_m2 in the aft base (zero when the area is unknown: then the base drag gets no relief).

pub fn with_pod_motors(self, pod_motor_areas_m2: [f64; 4]) -> Self

These conditions with thrusting motors in pods, of total cross-section pod_motor_areas_m2[k] in the kth pod set holding motor mounts, each pod’s share off its own base (Self::thrusting_pod_motor_areas_m2). The area in the aft base (Self::thrusting) is the airframe’s motors’ alone.

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

Checks that the Reynolds number and the area are finite and non-negative, and that a coasting rocket has no thrusting area.

Errors

AeroError::Domain otherwise.

Trait Implementations

impl Clone for DragConditions

fn clone(&self) -> DragConditions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for DragConditions

impl Debug for DragConditions

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DragConditions

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DragConditions

fn eq(&self, other: &DragConditions) -> 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 DragConditions

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 DragConditions